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The sunlight reaching you at this instant left the sun about 8 and 1/3rd minutes ago.
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∙ 14y ago
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When did Regulus first give off light?
Regulus first gave off light 77.5 years ago...which from today 2012, it would be around 1935. But this is not accurate.
Is sun a fossil fuel?
NO, The sun shines today and hopefully tomorrow and brings warmth and light as it did to the dinosaurs millions of years ago that since has been converted to the crude oil we recover today.
Do you see stars as they are or as they were?
as they were, the time it took the light to travel from them to us determines how long ago we are viewing, even the light from our sun is 8 minutes old if I remember right.
Why do astronomers say that looking at constellations is looking into the past?
Because of the speed of light. A light year is a term of measurement of distance, not time - i.e. the distance that light can travel in one year. Light travels at 299,792,458 metres per second - almost 3 million kilometres a second - therefore in one year it would travel a collosal distance - near 94 million million kilometres. When astronomers say a planet is 400,000 light years away, what we see of this planet happened 400,000 years ago since the light is only reaching us now. It would be another 400,000 years before we see that planet as it is today.
Are you seeing into the past when you look at the moon?
Yes but only about 1.3 seconds ago as this is how long light takes to reach us from the Moon.
How can we know how some parts of the universe looked a million years ago?
Light takes time to travel, so light reaching us from a million light years away has taken that long to travel to us. We see what it looked like when the light left.
What was earth like when light reaching us left theta eridani?
Theta Eridani is at a distance of 120 light years; this means that light reaching us now left it 120 years ago. At that time, there were no cars, no airplanes, no computers, no Internet, ...
How long ago is 1927 from 2016 today?
79 years ago.
Does the Dunkleosteus live today?
no, it lived long ago
What is the difference between microscope today and a long ago?
If you are talking about a light microscope, not very much. The largest difference is varying lenses and the light source. Today the light is uniform from a bulb and not from a candle or the sun. Also modern ones are more powerful because of the precision used to make them
What is the major gas that is present today and long ago?
co2
What is sobibor like today?
its just buildings showing what happen long time ago and picts of people that was their long time ago
How long ago was a electric light used?
it was used in 18816
How long ago did pirates live?
pirates are still here today.
What do you do today that Greeks did long ago?
Some of the things that we do today that Greeks did long ago include voting for our representatives in government. We also use many of the inventions of the Greek people including many types of mathematics.
We were left behind a long time ago but today we can tell you a lot about earth's history what are we?
We were left along time A ago , but today we can tell you A allot about earths history . What am I ?
Do you agree or disagree than things are better today than years ago?
I agree with you that things that we have know were better than long time ago because today we have computers and long time ago we didn't and if we didn't have computers know I wouldn't be answering this question.
