Can you see a billion years into the past?

The night sky is full of stars, and those stars are incredibly distant. The distances are measured in light years , which corresponds to the distance travelled by light in one year. That’s about 9 trillion km. Alpha Centauri , the nearest star visible to the unaided eye, is at a distance 270,000 times the distance between Earth and the Sun. That’s 4 light years, so we see Alpha Centauri as it was 4 years ago.

Was this answer helpful?


0 (0)

Upvote (0)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *




Free Class