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The Sun’s core is 36,000,000 F.
The stars are huge balls of superheated gas.
The sun is in the Milky way galaxy.
It makes its own light and heat.
• The planet Mercury has no moons.• Its surface is rocky with craters.• The atmosphere is thin, containing
oxygen and helium.• The diameter is 4878 km. • One day on Mercury is 59 Earth
days.• One year on Mercury is 88 Earth
days.
• The planet Venus has no moons.
• Venus’s surface is rocky.
• The atmosphere is thick and mostly carbon dioxide and nitrogen.
• Its diameter is 12,100 km.
• One day on Venus is 243 Earth hours.
• One year on Venus is 225 Earth days.
• Earth has one moon. It’s surface is mostly water, with areas of soil covered rock. The atmosphere is nitrogen and oxygen. It’s diameter is 12,756 km. A day on Earth is 24 hours, and a year is 365 days.
• The planet mars has two moons.
• Its surface is rocky and covered with dust.
• The atmosphere on mars is thin and mostly carbon dioxide.
• Its diameter is 6,786 km.
• A day on Mars is 25 Earth hours.
• A year is 687 Earth days.
• The planet Jupiter has 16 moons.
• Its surface is a gas planet possibly with liquid hydrogen surface.
• The atmosphere is hydrogen and helium.
• Jupiter’s diameter is 142,984 kilometers.
• One day on Jupiter is 10 Earth hours.
• A year is 12 Earth years.
• Saturn has 19 moons.• Its surface is gas with
no solid surface.• The atmosphere is
mostly hydrogen and helium.
• Its diameter is 120,536 km.
• A day on Saturn is 10 Earth hours.
• A year on Saturn is 29.5 or 29 and 1 half Earth years.
• Uranus has 17 moons.
• Its surface is gas with no known solid surface.
• The atmosphere is hydrogen and helium.
• The diameter is 51,108 km.
• A day is 18 Earth hours.
• A year on Uranus is 84 Earth years.
• Neptune has 8 moons.• The surface of
Neptune is gas with no solid surface.
• Neptune’s atmosphere is hydrogen, helium, and methane.
• The diameter is 49,538 kilometer.
• One day on Neptune is 19 Earth hours.
• One year is 165 Earth years.
• Pluto has one moon.
• The surface is water and methane ice.
• Its atmosphere is methane.
• The diameter is 2,350 km.
• One day is 6 Earth days and one year is 248 Earth years.
• The Asteroid belt contains 50,000 known asteroids.
• The largest asteroid is 1,000 km. in diameter.
• Asteroids are made out of rock and metal.
• It is located between Mars and Jupiter.
Solar System
• The Solar System contains galaxies, planets, the sun, the Asteroid belt, the Kuiper belt, and the Oort cloud.
• It also contains the smaller bodies which are comets, asteroids, meteoroids, and stars.
• MERCURY: In sunlit areas the surface is hot enough to melt lead.
• VENUS: Venus rotates backwards compared to other planets.
• EARTH: Has the only known life in the Solar System.
• MARS: Has the Solar System’s largest volcano, Olympus Mons, that has a base larger than New Mexico.
• JUPITER: “ The Great Red Spot “ on Jupiter is a gigantic storm that has lasted since the time of Galileo.
• SATURN: It has a wide, thin system of rings made of small pieces of rock and ice.
• URANUS: A possible collision with an earth-sized object that may have knocked Uranus on its side. As a result, it rolls around in orbit.
• NEPTUNE: It is one of the windiest places in the Solar System. Winds top about 620 miles per hour.
• PLUTO: It is normally the ninth planet but its orbit goes inside Neptune and Uranus making it sometimes the eighth planet.
• SUN: The Sun’s surface is cooler than its atmosphere.
• An asteroid is a chunk made of rock and metal that orbits the sun.
• There have been 26 asteroids discovered.
• Asteroids don’t have enough gravity to pull themselves into the shape of a ball.
• A comet is a world of dust and ice.
• Another name for a comet is planetesimal.
• Comets are found in the Kuiper belt and the Oort cloud.
• Stars are big exploding balls of gas.
• They are mostly made of helium and hydrogen.
• The Sun is the biggest star because it is the closest.
• The Milky Way Galaxy has 200 billion stars.
• A disk, a bulge, and a halo are the three main components.
• Milky way’s mass is between 750 billion and one trillion solar masses.