Light isn't instant; it needs time to travel. Our own sun is 8 light minutes away.
What we're really seeing is what the sun looked like 8 minutes ago.
Other planets and stars allow us to see much further back in time.
Telescopes are time machines.
Light isn't instant; it needs time to travel. Our own sun is 8 light minutes away.
What we're really seeing is what the sun looked like 8 minutes ago.
Other planets and stars allow us to see much further back in time.
Telescopes are time machines.