All of the planets in our Solar System are less than a light year away, but no other planets around other stars are within that distance.
the stars emitt its own light. But the planets do not have any own light. It absorbs the light from the stars like a sun. It just reflects the light. And also the stars are far away from the earth than the planets. So we can found the twinkling of stars but not the planets.
it not because some plants are far away from the sun so they get less light if they get less light the day will be short
There are no planets at that distance from the Earth. The Earth is 8 light minutes away from the Sun. Neptune is 3 light hours from the Sun. The closest star, and therefore the closest planet outside of our solar system would be Alpha Centuri at 4.24 light years away.
Yes it does but the planets closer to the sun get more heat and the planets that are farther away get less heat. That is why Venus is hotter than our Earth and Mars is colder.
All of them do.
For a supernova to directly destroy Earth, it would need to be less than 10 light years away. However, even if a supernova were to occur farther away, its effects on Earth's atmosphere and climate could still be substantial.
Three planets come within 100 million miles of Earth: Mercury, Venus, and Mars. However, these planets will be more than 100 million miles away depending on where they are in their orbits relative to Earth.
No.
An Au is defined as the average orbital radius between the Earth and the Sun. It's a shorthand unit used to make Keplar's Laws calculations easier. Since the distance between Earth and the Sun is equal to 1 AU, all the planets between Earth and the Sun orbit less than one AU away from earth. In addition it is possible that Mars also orbits 1 AU away from Earth, but I am not certain as to weither or not it actually does.
Eris is far less than a light year away. Eris varies in distance between 99 and 37 astronomical units away, which works out to 0.00059 and .00156 light years.
Mercury, Venus, and Mars.
Just our Sun....it is approximately 8 light minutes from Earth. yes, the sun, our star.