Planets are colder the farther they are from the Sun because they receive less sunlight and heat. The Sun’s energy gets weaker as the distance increases, so the planets located farther away do not warm up as much. For example, ...

Day and night are caused by the rotation of the Earth on its axis. The Earth spins around an imaginary line called the axis, which takes about 24 hours to complete one full rotation. When a part of the Earth ...

An astronomical unit (AU) is a unit of measurement used to describe the distance between the Earth and the Sun. It is approximately equal to 150 million kilometers. Astronomers use this unit to measure distances within our solar system, as ...

To see the Milky Way, you need to be in a dark place away from city lights, as light pollution can block its view. The best time to observe it is on clear, moonless nights, usually during the summer months. ...

Venus appears very bright because its atmosphere is covered with thick clouds that reflect a lot of sunlight. These clouds are made of gases like carbon dioxide, which bounce sunlight back into space, making the planet shine. Venus is also ...

Galaxies are large groups of stars, gas, dust, and other objects that are held together by gravity. Our solar system is part of the Milky Way galaxy, which contains billions of stars. There are billions of galaxies in the universe, ...

The Milky Way Galaxy is a large collection of stars, gas, dust, and other celestial objects, including our solar system. It appears as a bright, milky band of light in the night sky, which is why it is called the ...