Recent comments in /f/space

TheBigNook t1_je6shh7 wrote

I don’t know. The pollution affiliated with space flight is tremendous and I don’t know if the trend will be supported by governments if it becomes popular.

If only the elite can access it then the pollution may not be too crazy but if it’s affordable even for the minor rich I believe governments will get involved and regulate it or prevent it altogether.

But what do I know? The dollar talks and if there is money to be made and the government stays on its trend of not really caring too much about pollution then yeah you very well be able to go to space sometime in the future.

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YourWiseOldFriend t1_je6qrqa wrote

>photons have no mass

How then are they redirected when in the proximity of a stellar gravity field? How does that happen when they have no mass?

>EM and photons are well understood

And here I was, thinking they call it black matter and black energy precisely because they don't understand what it is.

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lezboyd t1_je6qfkk wrote

My takeaway from this and other such articles regarding exoplanets is that it seems much more common for gaan giants to be orbiting near their star, and it seems Jupiter is an outlier in that sense. It seems Jupiter would've also been this way if not for the formation of Saturn whose gravitational pull stopped it advancing inwards and caused it to retreat back to where it presently is.

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LunaticBZ t1_je6on79 wrote

This article is poorly written.

The main reason it's taken so long to get back to the moon is there's no point going to the moon for a photo op.

NASA realized when we go back it should be to stay.

Why the Artemis missions are focused on figuring out how to set up permanent presence both on the moon and the Lunar Gateway.

We need water on the moon, for water mainly. And for Hydrogen.

What the moon truly offers though is long term and that's manufacturing, refining, and mining. Off of Earth.

We aren't launching any mega structure from Earth ever. No matter how good rockets get.

From the moon... Yes we can build mega structures.

SLS program is already done they are only building the current rockets. Starship will be the rocket used for future programs.

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cjameshuff t1_je6137m wrote

There isn't a "point" to a magnetosphere, we just happen to have one. Its importance as a radiation shield is wildly exaggerated, and Earth regularly goes through periods with no strong, organized global field. The existing atmosphere of Mars provides more surface protection than Earth's magnetosphere provides in LEO, and Earth's atmosphere provides most of its protection from cosmic rays. A terraformed Mars would have an atmosphere with nearly 3 times the column mass due to its lower gravity, and even without an magnetosphere would have far better protection than Earth.

As for orbit, only LEO is protected. Satellites and probes are better off outside the magnetosphere than they are in medium Earth orbit where the belts are, and missions with humans have to plan trajectories that take them around the belts. And geomagnetic storms only pose a problem on Earth because we have a large magnetic field to get buffeted around by changes in the solar wind that we otherwise wouldn't notice.

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space-ModTeam t1_je5y4b0 wrote

Hello u/HuygensCrater, your submission "Can we make Mars's magnetosphere stronger?" 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.

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asssuber t1_je5u5qc wrote

Look at the proposals for protecting Earth during it's next geomagnetic reversal. I can't find now, but there are basically two main approaches: the L1 satellite one that DanFlashesSales said, and the superconducting rings over the surface that more closely reproduce the natural magnetosphere. For Mars, as far as it don't have a huge industry, the first one seems more realistic, but both are massive enterprises.

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cjameshuff t1_je5ss6c wrote

> This would help a a lot for future missions and future terraforming.

It would mostly mean that satellites and spacecraft would have radiation belts to deal with, and Mars itself would be subject to geomagnetic storms. Neither of these is very "helpful".

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