Browse Facts

Astronomy Facts

1 How big are stars ?
There are stars in the sky that can be 100 to 1000 times the diameter of the sun, these are supergiant stars. Giant stars can be 10 to 100 times the diameter of the sun. There are also dwarf stars that are 1000 times smaller the diameter of the sun.
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2 The Closest Star
The sun is the closest star to Earth. It is about 150 million km away.
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3 How do Stars form ?
Stars begin as gases and dust particles that are pulled together by gravity. These are stellar nurseries.
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4 Sun's temperature
The sun's temperature on the surface is about 6000 degrees Celsius.
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5 What is a supernova ?
Supernovae is the event when a star explodes and dies.
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6 What are stars made of ?
Stars are made up of mainly hydrogen and helium gases. The gases are constantly exploding.
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7 Do stars last forever ?
Stars will live for about 10 billion years. After that they no longer exist.
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8 Moon Temperature
The temperature on the moon can range from 171 degrees Celsius below zero to 111 degrees Celsius.
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9 Moon's age
The moon is around the same age as Earth, about 4.6 billion years old.
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10 Moon's make up
In 1988, a survey was conducted of what people thought the moon was made of. 13% said cheese.
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11 Moon's path
The path the moon takes around Earth is called an orbit. It travels around Earth every 27 days.
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12 Moon's orbit
When the moon orbits around the Earth, the same side is always facing Earth.
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13 Moon craters
The moon is covered in craters because around 4.1 to 3.8 billion years ago it was hit by space rocks.
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14 Moon Diameter
The moon's diameter is around 3,476 km.
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15 Moon's gravitational pull
A person who weights 60 kg on Earth would only weigh 10 kg on the Moon due to gravitational pull.
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16 The Moon is moving
The moon is moving about 3.8 cm away from Earth each year from Earth's rotational energy.
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17 How far away is the moon ?
If a person could walk to the moon it would take them 10 years to reach it.
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18 Planet Venus
Venus is the third brightest sight you will see in the sky behind the sun and the moon.
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19 Venus Rotation
It takes Venus 243 Earth days to travel around the sun. It also travels in the opposite direction of Earth
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20 Venus and Earth Similarities
Venus and Earth are very similar in regards to their size, mass, density and volume but that is it.
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21 Venus Temperature
Venus's surface temperature can reach 482 degrees Celsius which is from the greenhouse gas effect from the large amounts of carbon dioxide on the planet.
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22 Earth Weight
The earth weighs approx. 6,588,000,000,000,000,000 tons
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23 The Name Venus
The planet Venus is named after the Roman Goddess of Love.
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24 Water on Venus
Earth and Venus were both formed at the same time but Venus has virtually no water left on the planet.
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25 Pressure on Venus
On the surface of the planet Venus, the atmospheric pressure is 90 times more than on Earth.
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26 Venus Landscape
Venus's land is 90% volcanoes and has very many craters on it according to radar mapping.
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27 Are there moons with Venus ?
There are no moons with Venus.
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28 Does it rain on Venus ?
Even though there is no water on Venus, it still forms rain clouds. However, the clouds produce sulphuric acid rain, which is deadly.
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29 Where is Venus located ?
Venus is the closest planet to Earth. It is the second planet from the sun.
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30 Location of Venus
Venus is located 108, 200, 000 km from the Sun.
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31 Venus the Mystery Planet
Astronomers have always had difficulty discovering Venus because is covered by thick clouds. In the last 30 years astronomers have been able to discover more about the planet.
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32 Venus Phases
Like the Moon, Venus goes through phases. These phases can be viewed through a telescope, the planet appears to change shape and size..
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33 Clouds on Venus
The clouds that cover Venus are very thick and spin rapidly. They also hold the heat in which is why Venus remains has such a high temperature.
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34 Venus's Two Sides
Ancient philosophers once thought that Venus was two different planets, because it could be seen both in the morning and at night.
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35 Craters hitting Venus
Even though the atmosphere is thick on Venus, craters can still get through. Venus has been hit around 900 million times by craters.
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36 Venus Highland Areas
Venus has two large highland areas. Ishtar Terra is in the North Pole region and is about the size of Australia. Aphrodite Terra is on the equator and is around the size of South America.
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37 Surface of Venus
The surface on Venus has been described as molten lead.
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38 Study of Venus
Currently there is an extensive study of the planet underway. The Venus Express, a Russian Federal Space Agency's shuttle, is in Venus's orbit
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39 Venus in the Solar System
The sixth largest planet in the solar system is Venus.
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40 The Weight of Mars
Mars weighs 6.421e23.
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41 Mars Ozone Layer
Unlike Earth the planet Mars does not have an ozone layer
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42 Olympos Mons
The Volcano Olympos Mons is the largest in the solar system. It is 15 miles high, and 300 miles across.
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43 Mars Soil
Mars is covered with red rock and soil. The reason they are read is from the iron rusting in the rocks and soil.
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44 Mars Seasons
Like the Planet Earth, Mars has the same seasons that we do.
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45 How long is Summer on Mars
The Summer period on Mars is 183 days on the Northern part of the planet. It is 158 days on the Southern part of the planet.
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46 When Was Pluto Discovered
Pluto was discovered in 1930
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47 Is Pluto a Planet
Pluto is no longer recognized as a planet in our solar system. In 2006 the IAU demoted the planet to a dwarf planet
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48 How Big is Pluto
The planet Pluto is 1430 miles in diameter, which is 18% of the Earth's diameter
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49 How Cold is Pluto
The planet Pluto is very cold the average temperature is about -382F
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50 Has Anyone Ever Been to Pluto
Pluto is the only planet in our solar system that has not been seen up close by our spacecrafts.
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51 Where is Jupiter
The planet Jupiter is the 5th planet out from the Sun.
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52 Largest Planet in the Solar System
The largest planet in our Solar System is Jupiter
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53 Most Volcanic World in Our Solar System
Jupiter is the most Volcanic planet in our Solar System.
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54 Moons of Jupiter
There are 63 different moons around Jupiter. They all vary in size and makeup
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55 Largest Moon of Jupiter
The largest moon of Jupiter is Io, it was discovered by Galileo in 1610
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56 How Big is Io Moon of Jupiter
The moon Io, the largest moon of Jupiter is 3636km in diameter
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57 Planet Closest to the Sun
The planet Mercury is the closest planet to the Sun in orbit approx 36 million mile away.
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58 What is the Size of Mercury
Mercury is 3031 miles in diameter its weight is an astounding 7.27525465X10 to the 23rd power.
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59 Planet Mercury's Original Name
The planet Mercury originally had two names, Apollo and Hermes.
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60 Mercury in Relation to Roman Mythology
Roman mythology considered Mercury the God of commerce, thievery and travel
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61 Mercury Atmosphere
The atmosphere on Mercury is a mixture of Hydrogen and Helium.
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62 Where is Neptune
Neptune is the 8th planet outward from the Sun, and is about 3 billion miles from Earth
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63 Has Anyone Ever Been to Neptune
In 1989 Voyager 2 a robotic probe was 3100 miles off Neptune
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64 Who discovered Neptune
The planet Neptune was discovered in 1845 by John Couch Adams
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65 Neptune's Moons
Neptune has 13 moons they main moons are called Triton and Nereid.
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66 Why is Neptune Blue
The planet Neptune appears blue as a result of the various gases on the planet. The main gas the emits the blue color is Methane.
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67 Saturn Facts
Saturn has the lowest density of all planets. The planet would actually float if placed in water.
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68 Saturn's Rings
The planet Saturn has 4 main rings, they are identified by letters A,B,C and F.
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69 Saturn Mythology
Saturn was named after the Roman Lord of the Rings, the father of Jupiter
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70 How Many Moons Does Saturn Have
The planet Saturn has 47 moons.
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71 Length of Day on Saturn
Saturn's day is relatively short at 10.656 hours
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72 What is the avg. temp. on Uranus
The average temperature on Uranus is -195 degrees Celsius
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73 When was Uranus Discovered
Uranus was discovered in 1791 by William Herschel
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74 What is Uranus made of
Uranus' atmosphere is mostly gas, hydrogen, helium methane and ammonia.
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75 Why is Uranus Blue
Like its twin planet Neptune, the planet appears blue in color as a result of the Methane gas
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76 Uranus Mythology
The Greek God of the heavens was what Uranus was named for.
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77 Length of Day on Uranus
Uranus' day is 17 hours long.
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