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Science

Whatthe_Firetruck

(610 posts)

2. Pfff... The 10k year figure is closer to being right.

Reply to Judi Lynn (Original post)

Fri Mar 10, 2023, 12:33 AM

Mar 2023

The nova was 8k lightyears away. It would take that long for light to travel from there to where we are.

Now this light shone on earth 1800 years ago. So it would have had to happened 8k years BEFORE that to reach us then.

We (well, the Chinese) saw it 1800 years ago. The nova that caused the flash happened 8k years before the observation. 1800 + 8000 = ~10k years.

Light travels @186k miles per second. If the nova happened at around the observation date, it would have to travel the 8k ly instantaneously, an impossibility.

The idea that it was brighter or more forceful than most novas doesn't matter. The speed of light is the speed of light - a fixed constant, no matter what it's brightness or force.

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Highlight:

Ghostly scraps of oldest recorded supernova revealed in stunning telescope image [View all] Judi Lynn Mar 2023 OP

This is just so fascinating n makes my imagination wonder Deuxcents Mar 2023 #1

Pfff... The 10k year figure is closer to being right. Whatthe_Firetruck Mar 2023 #2