Recent comments in /f/space

Historical_Gur_3054 t1_j6y3exk wrote

That reminds of the pic Collins took of the LEM Ascent module coming up from the moon with a partial earth in the background.

While a great shot all by itself it took on a more interesting tone when you realized that every human being alive at that point except one was in that picture.

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salawayun t1_j6y2rcd wrote

Based on what I read in r/astrophotography, the cheapest one that they recommend for the purpose you mentioned is the Orion SkyScanner 100mm.

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Varsect t1_j6y1kr6 wrote

>Let's pretend you could live forever or not die up there, what would it look like?

Then atoms wouldn't decay, so the universe would have to be immortal aka ∞. Kinda strange but for most of it, it would be empty space. Infact, most nebulae wouldn't even be visible as they are either visible in infrared or are only visible through filters from telescopes with far more resolution/seeing capabilities i.e Hubble. Only some Nebulae like the Tarantula nebula and the Orion and Rosette nebula would even be visible and nebulae are pretty sparse so it would still end up looking like empty space from the inside. You would barely just notice you were inside one. But hey, one quick tour through the galaxy wouldn't be so bad.

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danielravennest t1_j6xy7x2 wrote

There's plenty of water already in space. Some nearby asteroid types contain up to 20% water and carbon compounds. The carbon compounds typically have hydrogen, and that can be combined with mineral oxides (most rocks) to make more water.

Beyond the "frost line" in the middle of the asteroid belt, water can survive in a low-g vacuum environment, so there is lots and lots of water as water and ice.

Besides, most rocket launches produce more water than they can carry as payload. They take oxygen from the air and burn it with hydrocarbons. The exhaust is CO2 and water.

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