A comet is a small icy object that orbits the Sun. It is made of dust, gas, and ice. When a comet comes close to the Sun, the heat causes the ice to melt and release gas and dust, forming ...

Asteroids are rocky objects that orbit the Sun, mostly found in the asteroid belt between Mars and Jupiter. They are smaller than planets and can vary in size, ranging from tiny rocks to large bodies several hundred kilometers wide. Unlike ...

The Moon has no atmosphere because its gravity is too weak to hold gases around it. Unlike Earth, the Moon’s small size and low mass cannot trap gases to form a protective layer. Without an atmosphere, there is no air, ...

Craters on the Moon are bowl-shaped holes formed when meteors or asteroids hit its surface. These impacts happened millions of years ago because the Moon has no atmosphere to burn up space objects before they crash. Craters vary in size, ...

The Moon takes about 27.3 days to complete one orbit around the Earth. This period is called a sidereal month. However, because the Earth is also moving around the Sun, it takes slightly longer—29.5 days—for the Moon to go from ...