Recent comments in /f/space

space-ModTeam t1_j3x7vlf wrote

Hello u/v1cv3g, your submission "What is the most terrifying thing that you wish it would happened to you?" has been removed from r/space because:

  • It is not related to space.

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

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Adeldor t1_j3vu7bl wrote

> A green comet will appear in the night sky for the first time in 50,000 years.

This green comet will appear in the night sky for the first time in 50,000 years. Green comets are otherwise not unusual. As I mentioned under another similarly worded post, I took this image of comet Hyakutake in 1996.

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curious_dark_matter OP t1_j3vjx9s wrote

A green comet will appear in the night sky for the first time in 50,000 years. NASA scientists said the comet is expected to make its closest approach to the sun, or perihelion, on Jan. 12, and will be visible to stargazers in the Northern Hemisphere. Those in the Southern Hemisphere should be able to view the comet in February. The comet will shift to the northwest on the horizon throughout January and it will make its closest pass of Earth between Feb. 1 and Feb. 2, according to NASA. During that time, the comet will be 26 million miles away from the planet, according to astronomers.

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Ardashasaur t1_j3uu2wu wrote

Reply to comment by No_Assumption_6028 in Milkdromeda. by Acuate187

I don't think it could be confirmed by atmosphere alone, no telling how an atmosphere is composed on an alien planet. Detecting something like CFCs would be a really strong sign but still not 100% if there is some wacky geological process or unknown reactions from alien elements.

Edit: that being said focusing on a planet with CFCs in atmosphere would still be really cool anyway

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Ardashasaur t1_j3uezrb wrote

Reply to comment by No_Assumption_6028 in Milkdromeda. by Acuate187

I don't think breathable air counts as signs of industry. Although looks like JWST has found a planet with carbon dioxide which is interesting.

So you are right I guess that it could possibly detect industrial emissions.

Interestingly enough the planet with CO2 found is 700 light years away which could hint at industrial life there (but still going to be pretty hard to be certain), but if they were looking at us then they would only see Earth's atmosphere 700 years ago which would have a lot less CO2 then now.

But anyway in terms of electrical emissions, radio waves or seeing constructions on surface (or even orbital) I think it's pretty hard to get anything from the nearest solar system to ours, you can't just take a quick photo so everything is going to be super blurry

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MasterKaein t1_j3ssjvb wrote

Because the Chinese will launch massive rockets the weight of a building up in space and leave them without any plans for their fall, whereas the US sends a satellite that weighs about the same as a truck and catches the thruster rocket in the ocean safely.

The satellite will most likely burn up on re-entry, leaving only tiny fragments if anything that touches the ground. The rocket will not, and will crash and leave a crater somewhere.

That's the difference.

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