# How long does it take for light to reach our eyes from a star that is 502 light years away?

Relevance
• 1 day ago

A few seconds or right away in some cases

• 2 days ago

Just over 502 normal years to be seen.

• 3 days ago

In astronomy, the distance to a star is defined by how long it TOOK a photon to leave the star and reach us. Therefore, in astronomy, the light from that star (502 light-years away in "astronomical distance") took... wait for it... 502 years to reach us.

However, in cosmology - which tried to study the structure of space as it would be, if we could see it as it is NOW - the light from a star that is 502 light-year from us NOW, would have taken a tiny bit less than 502 years.

The expansion of space is everywhere the same (as far as we can tell) and, on a local scale, is very slow. Compared to the universe (billions of light-years across, at least), 502 light-years is peanuts. The amount of extra space between that star NOW and where it was when the light left it 502 years ago, is extremely small. Approximately 11 metres (35 feet). I am sure that any proper motion of thestar (relative to us) would be a lot more than that.

Therefore, over such SMALL distances, we can use the same scale. The light took 502 years to reach us, regardless of the scale you use. We will not argue over a few seconds of time over five centuries.

• Clive
Lv 7
3 days ago

502 years, obviously.  That's the definition of what a light-year IS - the distance light travels in a year.

• 3 days ago

503 years.  Or maybe 501 years.

• 3 days ago

Aha !!

The hard ones first !!

A Light Year is the distance travelled by a Photon of Light in one Years Time

That is over 10 Trillion miles

Actual Velocity has been estimated as 186, 000 Miles Per Second

• Tom S
Lv 7
3 days agoReport

A little under 6 trillion miles actually.

• 3 days ago

It takes 502 years.

• MARK
Lv 7
3 days ago

That's a tough one. I'll get back to you on this.

After a lot of research I know the answer. It is 502 years!