❓ why
Why do we see more galaxies when we look farther back in space?
Quick Answer
Looking far away means looking back in time, because light takes time to travel. Distant regions show the Universe when it was younger, and galaxies were forming rapidly.
The Full Story
Because light travels at a finite speed, distant objects are seen as they were in the past. A galaxy one billion light-years away is seen as it was one billion years ago. In the early Universe, galaxies were smaller, younger, and more actively forming stars, so deep observations reveal many faint, irregular systems. Telescopes like Hubble and JWST have pushed that view back to only a few hundred million years after the Big Bang.
Key Facts
1.Light from distant galaxies takes millions to billions of years to reach us
2.The James Webb Space Telescope began science operations in 2022
3.Early galaxies were often smaller and more irregular
YouTube Angle
Suggested video title for this topic:
"Why is deep space also deep time?"
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