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One possibility would be V838 Monocerotis which exploded about 20,000 years ago.
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If a star is 2.5 million light years away approximately how long ago did the light leave?
2.5 million years
Are photos of far away space in your time or light years ago?
A 'light year' is not a time. It's a distance. Specifically, the distance that light travels in one year. So when you photograph a star that's located 10 light-years away from us, you photograph the light that left the star 10 years ago. Your photograph records the color, temperature, motion, and position of the star as of 10 years ago. If that star were to explode today, you could not know it until 10 years from today.
What does it mean when people look up at the stars and say seeing them how they were millions of years ago?
Generally speaking, this is a gross exaggeration. You see the stars as they were, at most, a few centuries ago. The reason is the light travels at a limited speed. In other words, it takes time to reach you. Distance between stars is measure in light years, which is the distance that light travels in a year. For example, if you look at a star that is 100 light years away, the light you see now left it 100 years ago. The stars you see at night are within the small part of our galaxy that is closest to us. Those stars are at most a few hundred light years away. A handful are less than 10 light years away. The only thing you can with the naked eye see as it was millions of years ago is the Andromeda galaxy, a massive collection of stars 2.5 million light years away. With a telescope you can see farther galaxies.
Why is an object 15 million light years away like looking at an object 15 million years ago?
Because you might have seen it in a telescope years ago idkAnother AnswerA light year is a measure of distance. If an object is 15 million light years away, the light you are looking at in this moment was produced 15 million years ago. If a star that far away went supernova at this moment, we wouldn't know it for another 15 million years.The light we see on the surface of our planet from the Sun is a little over 8 minutes old, because it took that light about 8 minutes to travel from the Sun to Earth.
When was mount Taylor's last eruption?
Mount Bachelor's last eruption was sometime between 10,000 and 15,000 years ago.
How can you convert 20000 years ago to millions?
.02 million years ago 2.0x10-8
When was Texas under the ocean?
20000 years ago
Why was it so cold in the UK 20000 years ago?
why as it so cold in the UK 200000 years ago
What year was 20000 years ago?
Year 17990 BC.
Is 20000 years ago before the birth of Christ Or is there no answer to that?
Yes.
When were cave paintings first used?
20000 years ago
When did the human population begin to grow at a faster rate than at any other time in history 20000 years ago 300 years ago 8000 years ago 1000 years ago?
300 years ago - roughly the same time as the industrial revolution escalated.
When was the first artificial light source made?
The first light source was probably fire. Building a fire with stones occurred in the Middle Paleolithic, between 200,000 and 40,000 years ago according to the link.
What was America like 20000 years ago?
The first "Americans" were able to migrate to the Western Hemisphere 20,000 or more years ago because North America was then connected by land to ASIA.
First people to migrate to the Americas beginning about 20000 years ago?
Asia.. If your doing PLATO. It's Asia.
How much sleep did people 100 years ago get?
The expectation is that we sleep about 20% less then 100 years ago. This is due to the imitation light in houses that influences our melatonin levels. 100 years ago we did not have a light source such as a television that bombards the brain with signals and light. Research has shown that watching television before going to bed can influence the sleep hormone melatonin drasticly. See the related link.
What was the first supernova called?
Probably the Vela supernova in the southern constellation Vela. Its source supernova exploded approximately 11,000-12,300 years ago (and was about 800 light years away).
