Recent comments in /f/space

demanbmore t1_j9xyt6a wrote

Reply to comment by zephyer19 in Could they move ice from the planets to Earth? by zephyer19

You're jumping to conclusions and making assertions way beyond what I'm saying. We're not ADDING salt to the oceans, we're just putting back what we took out. That has nothing to do with dumping plastics or other wastes in the ocean. Things would be very different if we mined salt from Mars and dumped that into our oceans - that would be adding things that didn't come from it just a few days or weeks ago. And understand that all the freshwater we removed would make its way back to the oceans too - that's how the water cycle works. That's the beauty of desalinization - we're just borrowing the freshwater from the ocean for a brief period of time again and again and again, which is what the normal process of evaporation, rainfall/snowfall, and runoff does constantly. The reason desalinization isn't practiced more often is because its energy intensive and expensive, but it's far less energy intensive and expensive as building a fleet of interplanetary mining and transfer ships.

1

stromm t1_j9xy89j wrote

Reply to Is it possible (at least theoretically) for an meteorite to ricochet from Earth instead of exploding? Are there any known cases (even if not on Earth)? by khukharev

LOTS of meteors skip off the Earth’s atmosphere. But not the tiny or very large ones.

Tiny can’t maintain enough kinetic energy because the atmospheric resistance slows them down too much. Very large (and I would guess that’s more than 100lbs, since most meteorites are below a pound) are more affected by gravity pulling them deeper into the atmosphere, which then slows them down.

The in between come in at a very shallow angle. Not close enough for gravity to pull deeper, so they only graze the top much less dense part of our atmosphere. So they skip off.

1

space-ModTeam t1_j9xy5ho wrote

Reply to why should the heigh of astronaut matter 🤔 by Ok-Medium-1853

Hello u/Ok-Medium-1853, your submission "why should the heigh of astronaut matter 🤔" has been removed from r/space because:

  • Such questions should be asked in the "All space questions" thread stickied at the top of the sub.

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.

1

space-ModTeam t1_j9xy0yk wrote

Reply to What’s a good upgrade from a telescope that can barely see jupiters stripes that isn’t worth a kidney? by Super-Gerd

Hello u/Super-Gerd, your submission "What’s a good upgrade from a telescope that can barely see jupiters stripes that isn’t worth a kidney?" has been removed from r/space because:

It looks like you are looking for recommendations on buying a telescope. Check out the beginner guide on r/telescopes for advice depending on your budget.

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.

1

space-ModTeam t1_j9xy0bh wrote

Reply to How would radiation affect attempts to colonize the Galilean moons? by Old-Entertainment-91

Hello u/Old-Entertainment-91, your submission "How would radiation affect attempts to colonize the Galilean moons?" has been removed from r/space because:

  • Such questions should be asked in the "All space questions" thread stickied at the top of the sub.

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.

1