Scale of the solar system

खेलकर सीखें

इन सवालों के जवाब देकर एनर्जी कमाएं, फिर मछली पकड़ें और घूमें। कोई अकाउंट नहीं चाहिए।

टीचर्स के लिए: Scale of the solar system (NGSS Middle School Science, Earth and Space Science) के लिए इस्तेमाल के लिए तैयार लेसन स्लाइड्स, रिवीज़न नोट्स — इन्हें अपने लेसन में इस्तेमाल करें, या टॉपिक को एक इंटरैक्टिव क्लास एक्टिविटी की तरह चलाएं जिसे आपके स्टूडेंट्स लाइव गेम की तरह खेलें।

लेसन नोट्स

The Solar System: An Overview

The solar system is made up of the Sun and everything that orbits it: eight planets, five recognized dwarf planets, asteroids, comets, and hundreds of moons.
The Sun sits at the center. Its gravity is what holds every other object in orbit.
The planets, in order outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Comparing the sizes and distances of these objects is hard because they range from a few hundred kilometers across to hundreds of millions of kilometers apart — numbers far bigger than everyday experience.

The solar system

The Astronomical Unit and Planetary Distances

Distances between planets are so large that kilometers become awkward to write and compare, so scientists use the astronomical unit (AU): the average distance from Earth to the Sun, about 150 million km.
Written in AU, Earth is 1.00 AU from the Sun and Neptune is 30.06 AU — instantly showing Neptune is about 30 times farther out.
| Planet | Distance from Sun (AU) | Length of Year (Earth years) | |---|---|---| | Mercury | 0.39 | 0.24 | | Venus | 0.72 | 0.62 | | Earth | 1.00 | 1.00 | | Mars | 1.52 | 1.88 | | Jupiter | 5.20 | 11.86 | | Saturn | 9.54 | 29.46 | | Uranus | 19.22 | 84.01 | | Neptune | 30.06 | 164.8 |
The table shows a pattern: the farther a planet orbits from the Sun, the longer its year, because it has a bigger orbit to travel and moves more slowly along it.

Modeling the Scale of the Solar System

The real solar system is too big to show accurately on a poster or a classroom floor, so scientists and students build scale models instead: every real distance is shrunk by the same factor.
One classroom activity places the Sun at one end of a 120.24-yard soccer field and Neptune at the other end, with the other planets placed in between according to their real distance in AU.
For a scale model to be useful, every distance must shrink by the×same×factor — otherwise the model misrepresents how the planets actually compare.

A scale-model field

Calculating a Scale Model

To turn real distances into model distances, first find the scale factor: divide the model length by the real distance it represents.
In the soccer-field model, Neptune's real distance (30.06 AU) is placed at the far end of the field (120.24 yards), so the scale factor is 120.24 ÷ 30.06 = 4 yards per AU.
Once the scale factor is known, any planet's model distance = its real distance in AU × the scale factor. Earth (1.00 AU) would sit 4 yards from the Sun in this model.

The scale-model field labeled

Relative Sizes of the Planets

Distance is only one kind of scale — the planets also differ hugely in size.
Drawn at the same scale, Mercury, Venus, Earth, and Mars are all quite small and close together in size, while Jupiter and Saturn dwarf them, and Uranus and Neptune sit in between.
Jupiter's diameter is about 11.2 times Earth's; Mercury's is only about 0.38 times Earth's — a single image of the eight planets side by side makes that size range obvious in a way a table of numbers does not.

The eight planets to scale

Terrestrial (Inner) Planets

Mercury, Venus, Earth, and Mars are the four planets closest to the Sun. They are called the terrestrial (rocky) planets.
Each has a solid rocky surface and a layered interior — a crust, a mantle, and a metallic core — though the layers differ in thickness from planet to planet.
Terrestrial planets are small compared with the outer planets: all four together would still fit inside Jupiter many times over.
Some terrestrial planets have a thin atmosphere (Mercury barely has one; Venus and Earth have thick ones), but none has rings, and only Earth and Mars have moons.

The inner planets' interiors

Gas Giant (Outer) Planets

Jupiter, Saturn, Uranus, and Neptune are the four gas giant planets. They are far larger than the terrestrial planets and lie much farther from the Sun.
They have no solid surface a spacecraft could land on — instead they are enormous balls of hydrogen, helium, and other gases and ices, with a hot, dense core thought to lie deep beneath the atmosphere.
Every gas giant has rings and many moons, though Saturn's rings are the easiest to see from Earth.

The outer planets' interiors

Dwarf Planets, Asteroids, and the Kuiper Belt

In 2006 astronomers agreed that a planet must (1) orbit the Sun, (2) be massive enough for its own gravity to pull it into a round shape, and (3) have cleared other debris out of the neighborhood of its orbit.
An object that meets the first two criteria but not the third is a dwarf planet. Pluto was reclassified this way; four other dwarf planets are officially recognized: Ceres, Haumea, Makemake, and Eris.
Ceres orbits in the asteroid belt, a region of rocky debris between Mars and Jupiter. The other four dwarf planets orbit in the Kuiper Belt, an icy region far beyond Neptune.
Even the largest dwarf planets are small on the scale of true planets — every one of them is smaller than Earth's Moon.

Dwarf planets compared with Earth

Moons of the Solar System

Most planets have at least one moon, and moon sizes vary just as widely as planet sizes: some are barely bigger than a mountain, while others are bigger than the planet Mercury.
Jupiter's moon Ganymede and Saturn's moon Titan are both larger than Earth's Moon; Mars's two moons, Phobos and Deimos, are tiny, oddly-shaped rocks only a few kilometers across.
Comparing moons against Earth on a single to-scale image is the same idea as comparing planets to scale — it turns a list of diameters into something the eye can judge directly.

Moons of the solar system to scale

स्लाइड्स

Step through every slide for this topic — plus flashcards and revision notes — with a free account.

साइन अप करें — फ्री लॉग इन

प्रैक्टिस सवाल

फ्री प्रीव्यू — 41 में से 8 सवाल। सभी देखने के लिए साइन अप करें।

1.What holds the planets in orbit around the Sun?
Easy
- AThe Sun's gravity
- BMagnetic fields
- CSolar wind pressure
- DFriction with space dust
2.The asteroid belt lies between the orbits of Mars and Jupiter.
Easy
True or false?
3.About what share of the solar system's total mass is contained in the Sun?
Easy
- A50%
- B80%
- C99.8%
- D10%
4.The Sun is an average-sized star, even though it is the largest object in the solar system.
Easy
True or false?
5.What is the main difference in composition between the terrestrial and gas-giant planets?
Easy
- ATerrestrial planets are rocky; gas giants are made mostly of gas and ice.
- BTerrestrial planets are made of gas; gas giants are rocky.
- CBoth types are made of the same materials in the same proportions.
- DTerrestrial planets have no atmosphere at all.
6.One astronomical unit (AU) is defined as the average distance between which two objects?
Easy
- AThe Sun and Neptune
- BEarth and the Moon
- CThe Sun and Earth
- DEarth and Mars
7.About how many million kilometers is 1 astronomical unit (AU)?
Easy
8.| Planet | Distance from Sun (AU) | Length of Year (Earth years) | |---|---|---| | Mercury | 0.39 | 0.24 | | Venus | 0.72 | 0.62 | | Earth | 1.00 | 1.00 | | Mars | 1.52 | 1.88 | | Jupiter | 5.20 | 11.86 | | Saturn | 9.54 | 29.46 | | Uranus | 19.22 | 84.01 | | Neptune | 30.06 | 164.8 | Using the table, which planet takes closest to 12 Earth years to complete one orbit of the Sun?
Easy
- AMars
- BJupiter
- CSaturn
- DUranus

और सवाल

9.| Planet | Distance from Sun (AU) | Length of Year (Earth years) | |---|---|---| | Mercury | 0.39 | 0.24 | | Venus | 0.72 | 0.62 | | Earth | 1.00 | 1.00 | | Mars | 1.52 | 1.88 | | Jupiter | 5.20 | 11.86 | | Saturn | 9.54 | 29.46 | | Uranus | 19.22 | 84.01 | | Neptune | 30.06 | 164.8 | Using the table, describe the relationship between a planet's distance from the Sun and the length of its year.
Medium
10.| Planet | Distance from Sun (AU) | Length of Year (Earth years) | |---|---|---| | Mercury | 0.39 | 0.24 | | Venus | 0.72 | 0.62 | | Earth | 1.00 | 1.00 | | Mars | 1.52 | 1.88 | | Jupiter | 5.20 | 11.86 | | Saturn | 9.54 | 29.46 | | Uranus | 19.22 | 84.01 | | Neptune | 30.06 | 164.8 | Using the table, how many Earth years does Saturn take to orbit the Sun?
Easy
11.Arrange these four outer planets in order of increasing distance from the Sun (closest first): Neptune, Saturn, Jupiter, Uranus.
Easy
- Neptune
- Saturn
- Jupiter
- Uranus
12.| Planet | Distance from Sun (million km) | Distance from Sun (light time) | |---|---|---| | Mercury | 57.9 | 3.2 light minutes | | Venus | 108.2 | 6.0 light minutes | | Earth | 149.6 | 8.3 light minutes | | Mars | 227.9 | 12.7 light minutes | | Jupiter | 778.6 | 43.3 light minutes | | Saturn | 1433.5 | 1.3 light hours | | Uranus | 2872.5 | 2.7 light hours | | Neptune | 4495.1 | 4.2 light hours | Using the table, which planet's sunlight takes about 12.7 light minutes to arrive?
Easy
- AEarth
- BMars
- CJupiter
- DVenus
13.What is the main reason scientists build a scale model of the solar system instead of just listing distances in a table?
Easy
- AA model uses less paper than a table.
- BA model lets people compare distances and sizes visually, at a size they can actually see and walk through.
- CA model is required by law for science classes.
- DA table cannot show any numbers larger than 100.
14.A class places the Sun at 0 yards and Neptune (30.06 AU from the Sun) at 120.24 yards on a scale model. What is the model's scale factor, in yards per AU?
Easy
15.Using that same scale factor (4.0 yards per AU), how far from the Sun should Mars (1.52 AU) be placed in the model?
Easy
16.Using that same scale factor (4.0 yards per AU), how far from the Sun should Jupiter (5.20 AU) be placed in the model?
Easy
17.In a scale model that correctly shows the×distances×between planets, why does Jupiter appear as only a tiny dot even though it is the largest planet?
Medium
- AThe model is wrong and needs to be redrawn.
- BA single scale factor cannot make both distances and sizes look right at once, so a distance-accurate model makes every planet look far too small.
- CJupiter is actually smaller than Earth.
- DDistance models never include planet sizes at all.
18.| Object | Orbit radius (cm) | Object radius (cm) | |---|---|---| | Sun | — | 5.0 (not to scale — should be 50 to match the planets) | | Mercury | 0.4 | 0.2 | | Venus | 0.7 | 0.8 | | Earth | 1.0 | 0.8 | | Mars | 1.5 | 0.4 | | Jupiter | 5.0 | 5.1 | | Saturn | 9.2 | 4.1 | | Uranus | 18.6 | 1.6 | | Neptune | 29.1 | 1.6 | This table comes from an activity that models the solar system on a small piece of cardboard. Explain why the table's footnote says the Sun's radius should really be 50 cm, not the 5.0 cm actually used in the model.
Medium
19.| Object | Mass (Earth = 1) | Diameter (Earth = 1) | Length of Day (Earth days) | Length of Year (Earth years) | |---|---|---|---|---| | Sun | 333,000 | 109.2 | --- | --- | | Mercury | 0.06 | 0.39 | 56.84 | 0.24 | | Venus | 0.82 | 0.95 | 243.02 | 0.62 | | Earth | 1.00 | 1.00 | 1.00 | 1.00 | | Mars | 0.11 | 0.53 | 1.03 | 1.88 | | Jupiter | 317.8 | 11.21 | 0.41 | 11.86 | | Saturn | 95.2 | 9.41 | 0.43 | 29.46 | | Uranus | 14.6 | 3.98 | 0.72 | 84.01 | | Neptune | 17.2 | 3.81 | 0.67 | 164.8 | Using the table, how many times larger is Jupiter's diameter than Earth's?
Easy
20.| Object | Mass (Earth = 1) | Diameter (Earth = 1) | Length of Day (Earth days) | Length of Year (Earth years) | |---|---|---|---|---| | Sun | 333,000 | 109.2 | --- | --- | | Mercury | 0.06 | 0.39 | 56.84 | 0.24 | | Venus | 0.82 | 0.95 | 243.02 | 0.62 | | Earth | 1.00 | 1.00 | 1.00 | 1.00 | | Mars | 0.11 | 0.53 | 1.03 | 1.88 | | Jupiter | 317.8 | 11.21 | 0.41 | 11.86 | | Saturn | 95.2 | 9.41 | 0.43 | 29.46 | | Uranus | 14.6 | 3.98 | 0.72 | 84.01 | | Neptune | 17.2 | 3.81 | 0.67 | 164.8 | Using the table, which planet has the smallest diameter?
Easy
- AMercury
- BMars
- CVenus
- DEarth
21.Earth is the largest of the four terrestrial (rocky) planets.
Easy
True or false?
22.Using the table of relative diameters, arrange these four terrestrial planets in increasing order of diameter (smallest first): Venus, Mars, Mercury, Earth.
Medium
- Venus
- Mars
- Mercury
- Earth
23.| Object | Mass (Earth = 1) | Diameter (Earth = 1) | Length of Day (Earth days) | Length of Year (Earth years) | |---|---|---|---|---| | Sun | 333,000 | 109.2 | --- | --- | | Mercury | 0.06 | 0.39 | 56.84 | 0.24 | | Venus | 0.82 | 0.95 | 243.02 | 0.62 | | Earth | 1.00 | 1.00 | 1.00 | 1.00 | | Mars | 0.11 | 0.53 | 1.03 | 1.88 | | Jupiter | 317.8 | 11.21 | 0.41 | 11.86 | | Saturn | 95.2 | 9.41 | 0.43 | 29.46 | | Uranus | 14.6 | 3.98 | 0.72 | 84.01 | | Neptune | 17.2 | 3.81 | 0.67 | 164.8 | Using the table, how many times larger is Saturn's diameter than Earth's?
Easy
24.| Object | Mass (Earth = 1) | Diameter (Earth = 1) | Length of Day (Earth days) | Length of Year (Earth years) | |---|---|---|---|---| | Sun | 333,000 | 109.2 | --- | --- | | Mercury | 0.06 | 0.39 | 56.84 | 0.24 | | Venus | 0.82 | 0.95 | 243.02 | 0.62 | | Earth | 1.00 | 1.00 | 1.00 | 1.00 | | Mars | 0.11 | 0.53 | 1.03 | 1.88 | | Jupiter | 317.8 | 11.21 | 0.41 | 11.86 | | Saturn | 95.2 | 9.41 | 0.43 | 29.46 | | Uranus | 14.6 | 3.98 | 0.72 | 84.01 | | Neptune | 17.2 | 3.81 | 0.67 | 164.8 | Using the table, which planet has a day longer than its own year?
Medium
- AMercury
- BVenus
- CMars
- DJupiter
25.Why can't a spacecraft land on the surface of Jupiter or Saturn?
Easy
- AThey are too far away for any spacecraft to reach.
- BThey have no solid surface — they are enormous balls of gas and ice with a hot core deep beneath.
- CTheir gravity is too weak to hold a spacecraft.
- DThey are covered entirely in liquid water oceans.
26.The four inner planets are made mostly of ___, while the four outer planets are made mostly of ___ and ice.
Easy
The four inner planets are made mostly of ____, while the four outer planets are made mostly of ____ and ice.
27.Saturn's rings are the most easily seen from Earth of any planet's rings.
Easy
True or false?
28.Mercury has the hottest average surface temperature of any planet, because it is closest to the Sun.
Easy
True or false?
29.Explain why Venus has a hotter average surface temperature than Mercury, even though Mercury is closer to the Sun.
Medium
30.An object orbits the Sun and is round, but has not cleared other debris out of the region around its orbit. How is it classified?
Easy
- AA full planet
- BA dwarf planet
- CA moon
- DAn asteroid
31.| Dwarf Planet | Diameter (km) | Number of Moons | Location | |---|---|---|---| | Pluto | 2,400 | 3 | Kuiper Belt | | Ceres | 950 | 0 | Asteroid belt | | Haumea | 1,916 × 1,518 | 2 | Kuiper Belt | | Makemake | 1,360–1,480 | 0 | Kuiper Belt | | Eris | 2,326 | 1 | Kuiper Belt | Using the table, which of these is NOT one of the five recognized dwarf planets?
Easy
- ACeres
- BTitan
- CEris
- DHaumea
32.Ceres, a recognized dwarf planet, orbits in the asteroid belt rather than the Kuiper Belt.
Easy
True or false?
33.| Dwarf Planet | Diameter (km) | Number of Moons | Location | |---|---|---|---| | Pluto | 2,400 | 3 | Kuiper Belt | | Ceres | 950 | 0 | Asteroid belt | | Haumea | 1,916 × 1,518 | 2 | Kuiper Belt | | Makemake | 1,360–1,480 | 0 | Kuiper Belt | | Eris | 2,326 | 1 | Kuiper Belt | Using the table, which dwarf planet has the most moons?
Easy
- ACeres
- BMakemake
- CPluto
- DEris
34.| Dwarf Planet | Diameter (km) | Number of Moons | Location | |---|---|---|---| | Pluto | 2,400 | 3 | Kuiper Belt | | Ceres | 950 | 0 | Asteroid belt | | Haumea | 1,916 × 1,518 | 2 | Kuiper Belt | | Makemake | 1,360–1,480 | 0 | Kuiper Belt | | Eris | 2,326 | 1 | Kuiper Belt | Using the table, what is Eris's diameter, in kilometers?
Easy
35.Explain why Pluto was reclassified from a planet to a dwarf planet in 2006.
Medium
36.Which of Jupiter's moons is larger in diameter than the planet Mercury?
Medium
- AIo
- BEuropa
- CGanymede
- DCallisto
37.Mars's two moons, Phobos and Deimos, are small, irregularly shaped rocks only a few kilometers across.
Easy
True or false?
38.What is the main advantage of showing several moons and Earth on one to-scale image, rather than just listing their diameters in a table?
Easy
- AIt uses less storage space than a table.
- BIt lets a reader judge relative sizes directly, rather than comparing raw numbers.
- CIt removes the need for any numbers at all.
- DIt only works for moons, not planets.
39.Which of these lists all four gas-giant planets, and no others?
Easy
- AJupiter, Saturn, Uranus, Neptune
- BJupiter, Saturn, Uranus, Pluto
- CMercury, Venus, Earth, Mars
- DJupiter, Saturn, Neptune, Ceres
40.The model below shows the Sun and the eight planets with their masses (Earth = 1) and equatorial diameters. Based on the diameters shown, about how many times larger is the Sun's equatorial diameter than Earth's?
Medium
41.| Moon | Mass (kg) | Equatorial Diameter (km) | Mean Distance from Its Planet (km) | |---|---|---|---| | Io (orbits Jupiter) | 8.93 \times 10²² | 3.63 \times 10³ | 4.22 \times 10⁵ | | Europa (orbits Jupiter) | 4.80 \times 10²² | 3.14 \times 10³ | 6.71 \times 10⁵ | | Ganymede (orbits Jupiter) | 1.48 \times 10²³ | 5.26 \times 10³ | 1.07 \times 10⁶ | | Callisto (orbits Jupiter) | 1.08 \times 10²³ | 4.82 \times 10³ | 1.88 \times 10⁶ | | The Moon (orbits Earth) | 7.35 \times 10²² | 3.48 \times 10³ | 3.83 \times 10⁵ | A class builds a scale model in which the mean Earth–Moon distance is represented by 10 cm. Using the table, what model distance (in cm) should represent the mean distance between Jupiter and its moon Europa?
Medium

रिवीज़न नोट्स

## Scale of the Solar System - **Solar System**: Gravitationally bound system of the Sun and objects that orbit it. The Sun contains **99.86%** of the total mass. - **Formation**: Formed ~4.6 billion years ago from a collapsing molecular cloud. The Sun formed at the center; planets formed by accretion from a protoplanetary disc. - **Planets**: Eight planets in order from the Sun: - **Inner (terrestrial) planets**: Mercury, Venus, Earth, Mars – small, rocky. - **Outer planets**: Jupiter, Saturn (gas giants), Uranus, Neptune (ice giants). - Jupiter and Saturn have ~90% of the non-stellar mass. - **Dwarf planets**: Ceres (asteroid belt), Pluto, Eris, Makemake, Haumea, and others (Orcus, Quaoar, Gonggong, Sedna). They orbit the Sun but do not dominate their orbits. - **Small bodies**: Asteroids (mostly in asteroid belt between Mars and Jupiter), comets, meteoroids, interplanetary dust. - **Moons**: Natural satellites orbiting planets. Largest moons (Ganymede, Titan) are larger than Mercury. - **Scale distances**: - **Astronomical Unit (AU)**: Average Earth–Sun distance (~150 million km). Used to measure distances in the solar system. - **Frost line** at ~5 AU separates inner and outer solar system. - **Heliopause** at ~70–90 AU (boundary where solar wind meets interstellar medium). - **Oort cloud** extends from ~2,000 AU to ~100,000 AU (source of long-period comets). - **Hill sphere** (gravitational influence of Sun) ends at ~178,000–227,000 AU. - Nearest star, Proxima Centauri, is ~269,000 AU away. - **Key concept**: The solar system is mostly empty space; planets are tiny compared to distances between them. Models often use scale to visualize sizes and distances.

Astronomical Unit (AU): The average distance from Earth to the Sun, about 150 million kilometers. Used to measure distances within the solar system.
Terrestrial planets: The four inner planets (Mercury, Venus, Earth, Mars) that are rocky and relatively small.
Gas giants: Jupiter and Saturn, the largest planets, composed mostly of hydrogen and helium.
Ice giants: Uranus and Neptune, composed of heavier elements like water, methane, and ammonia ices.
Dwarf planet: A celestial body that orbits the Sun, has enough mass for a round shape, but has not cleared its orbital neighborhood of other debris.
Asteroid belt: Region between Mars and Jupiter containing many small rocky bodies (asteroids) and the dwarf planet Ceres.
Kuiper belt: Region beyond Neptune containing icy bodies and dwarf planets like Pluto.
Oort cloud: A spherical shell of icy objects surrounding the solar system at distances from about 2,000 to 100,000 AU; source of long-period comets.
Heliosphere: The bubble-like region of space dominated by the solar wind, extending to about 70–90 AU.
Protoplanetary disc: A rotating disk of gas and dust around a young star from which planets form by accretion.

फ्लैशकार्ड

What percentage of the Solar System's total mass does the Sun account for?

The Sun accounts for 99.86% of the Solar System's total mass.

List the four terrestrial planets in order from the Sun.

Mercury, Venus, Earth, Mars.

What is the frost line and how far from the Sun is it?

The frost line is the distance from the Sun beyond which volatile compounds can condense into ice. It is located at about 5 astronomical units (AU).

Name the two gas giants and the two ice giants in the outer Solar System.

Gas giants: Jupiter and Saturn. Ice giants: Uranus and Neptune.

Which two planets orbit within the Sun's habitable zone?

Earth and Mars orbit within the Sun's habitable zone.

What is an astronomical unit (AU)?

An astronomical unit (AU) is the average distance from Earth to the Sun, about 93 million miles or 150 million kilometers.

What are dwarf planets?

Dwarf planets are objects of planetary mass that directly orbit the Sun but do not dominate their orbit (they share it with other bodies).

List the five dwarf planets recognized by the International Astronomical Union.

Ceres, Pluto, Eris, Makemake, and Haumea.

Where is the asteroid belt located?

The asteroid belt is located between the orbits of Mars and Jupiter.

What are trans-Neptunian objects?

Trans-Neptunian objects are small Solar System bodies that orbit the Sun at a greater distance than Neptune, including many dwarf planets in the Kuiper belt and scattered disc.

Which two moons are larger than the planet Mercury?

Ganymede (moon of Jupiter) and Titan (moon of Saturn) are larger than Mercury.

What is the heliosphere?

The heliosphere is a bubble-like region of space dominated by the solar wind, extending far beyond the planets.

What is the heliopause?

The heliopause is the boundary where the solar wind is halted by the interstellar medium, at about 70–90 AU from the Sun.

What is the Oort cloud?

The Oort cloud is a theorized spherical region of icy bodies surrounding the Solar System at distances from about 2,000 AU to 200,000 AU, the source of long-period comets.

Approximately how far away is the closest star, Proxima Centauri, in AU?

Proxima Centauri is about 269,000 AU away.

How old is the Solar System?

The Solar System formed about 4.6 billion years ago.

What process formed the Sun and planets?

The Solar System formed from the gravitational collapse of a region within a large molecular cloud, creating a protoplanetary disc from which the Sun and planets accreted.

What is the interplanetary medium?

The interplanetary medium consists of solar wind plasma, dust, gas, and cosmic rays that fill the space between Solar System bodies.

What is the Hill sphere of the Solar System?

The Hill sphere is the region where the Sun's gravitational influence dominates, extending to about 178,000–227,000 AU.

What are small Solar System bodies?

Small Solar System bodies include asteroids, comets, centaurs, meteoroids, and interplanetary dust clouds.

How much of the non-stellar mass do Jupiter and Saturn contain?

Jupiter and Saturn contain nearly 90% of the non-stellar mass of the Solar System.

What is the Local Bubble?

The Local Bubble is a relatively small region of the Milky Way, about 1,000 light-years wide, that contains the Solar System and nearby stars.

Unlock all 41 questions, flashcards & more

इस टॉपिक के हर सवाल, स्लाइड्स, फ्लैशकार्ड और रिवीज़न नोट्स देखने के लिए फ्री अकाउंट बनाएं।

साइन अप करें — फ्री लॉग इन

पास्ट पेपर

इस टॉपिक के लिए पास्ट-पेपर प्रैक्टिस जल्द आ रही है।

जल्द आ रहा है