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The Sun is the center of the solar system. It is a star ( a hot ball of glowing gases.) It is our closest star. The sun is big enough to hold over one million Earths. Even so, the sun is an average-sized star. The Sun is 870,000 miles across.
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The Sun is the center of the solar system. It is a star ( a hot ball of glowing gases.) It is our closest star. The sun is big enough to hold over one million Earths. Even so, the sun is an average-sized star. The Sun is 870,000 miles across. The Sun ‘s gravity helps hold the objects in the solar system in place. The Sun Click on the SUN to learn more.
If you were to step onto the surface of Mercury you would think that you were on the moon. Meteorites continually bombard the surface of Mercury. The sky is always black because there is no atmosphere to cause light from scattering. Mercury
Venus • Venus is sometimes called Earth's sister planet. In some ways they are very similar. • Venus is only slightly smaller than Earth and both have few craters indicating relatively young surfaces. • This dense atmosphere produces a run-away greenhouse effect that raises Venus' surface temperature by about 400 degrees.
Earth • Earth is our home. Earth is the third planet from the Sun and the fifth largest: • Seventy-one percent of the Earth's surface is covered with water. Earth is the only planet on which water can exist in liquid form on the surface .
Mars Mars is the fourth planet from the Sun and the seventh largest. Though Mars is much smaller than Earth, its surface area is about the same as the land surface area of Earth.
Mars • The first spacecraft to visit Mars was Mariner 4 in 1965. Several others followed including Mars 2, the first spacecraft to land on Mars and the two Viking Landers in 1976. Mars Pathfinder landed successfully on Mars on July 4,1997 .
Jupiter Jupiter Jupiter is the fifth planet from the Sun and by far the largest. Jupiter is more than twice as massive as all the other planets combined (318 times Earth).
The Great Red Spot on Jupiter • The Great Red Spot is a hurricane like storm that was first observed more than 300 years ago. The Spot is an oval about 12,000 by 25,000 km, big enough to hold two Earths.
Saturn Saturn is the sixth planet from the Sun and the second largest. Two prominent rings (A and B) and one faint ring (C) can be seen from the Earth. The rings are made of small ice and rock particles. They range in size from a centimeter to several meters.
Uranus • Uranus is the seventh planet from the Sun and the third largest. • Like the other gas planets, Uranus has bands of clouds that blow around rapidly.
Neptune • Neptune is the eighth planet from the Sun and the fourth largest (by diameter). • The surface is made of frozen gases.
Pluto • Pluto is made of ice. • It has a moon almost as big as it is. • Pluto is the farthest planet from the Sun (usually) and by far the smallest
Orbit Orbit The orbit is the path an object takes around another object in space. • The orbit is the path an object takes around another object in space.
Revolution • Revolution is the movement of one object around another object. Earth makes one revolution around the sun every 365 ¼ days. One revolution takes one year.
Rotation • Rotation is the spinning of an object on its axis.
Axis • The imaginary line that goes through the North Pole and the South Pole.
Solar Eclipse • A solar eclipse happens when the moon’s shadow falls on Earth. This happens when the moon moves between the Earth and the Sun. During a total solar eclipse, the moon blocks out the sun.
Lunar Eclipse • This is called a lunar eclipse. A lunar eclipse happens when Earth’s shadow falls on the moon. A total lunar eclipse causes all of the moon’s face to look dark red.
