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, ...
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A year, in astronomical terms, is the time it takes for the Earth to complete one full orbit around the Sun. This period is about 365.25 days long. To account for the extra 0.25 days, we add an extra day ...
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 ...
Stars look smaller than the Sun because they are much farther away from Earth. Although stars are huge, their light gets spread out over a vast distance by the time it reaches us, making them appear as tiny points of ...