25,000 light years is a distance equal to 1.4696563 x 10^17 miles.
25000 years.
It means it has taken light 130 years to travel the distance. Light travels 5,878,630,000,000 miles in 1 year, so something 130 light years away, is a LONG way away.
8 million years. A light-year is the distance light travels in a year.
Traveling at the speed of light, it would take a spacecraft 40 years to reach a star located 40 light-years away from Earth.
It's exactly 7 light years away.One light year is the distance that light travels through space in one year.7 of those is a distance of something like 41,150,289,900,000 miles.
It would take 100 years for a signal to travel from Earth to a star located 100 light years away.
12.8 billion light years away.
1,891 years
How long will depend on the velocity. The closest star would be 4.24 light years away
It would take 100 Earth years for a signal to travel from a star located 100 light years away to reach Earth.
A star that is 970 light years away from the Earth is ten times more distant from the Earth than one at 97 light years distant. At a light speed of 300,000,000 metres per second, that's a long way in anyone's language. Yes, that's three hundred million metres per second.
That depends on how far away the star is. If the exploding star is 1,000 light years away we would see the supernova 1,000 years later. If it is 2,000 light years away we would see it 2,000 years later.