Recent comments in /f/space
YourWiseOldFriend t1_je6qrqa wrote
Reply to comment by Anonymous-USA in Could Hawking radiation coming from black holes be the same as the dark energy accelerating expansion of the universe? by Rskingen
>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.
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.
speebrun t1_je6pl0g wrote
Reply to comment by Silver-Scholar-1662 in Water is trapped in glass beads on the moon's surface, lunar samples show by SaraShane
This comment is incorrect. The study shows the beads contain trace readings of hydroxyl.
LunaticBZ t1_je6on79 wrote
Reply to We Need to Get Back to the Moon by Guy_PCS
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.
[deleted] t1_je6nwb1 wrote
Reply to We Need to Get Back to the Moon by Guy_PCS
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[deleted] t1_je6nsii wrote
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TreeHawkFeather t1_je6miap wrote
Reply to Why from Earth do we see all these stars but in images taken from space we see none? by Suitable-Victory-105
So much light pollution on the moon. We really need to scale back development 😆😜
[deleted] t1_je6gvkx wrote
Reply to comment by cjameshuff in Can we make Mars's magnetosphere stronger? by HuygensCrater
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[deleted] t1_je6g5nk wrote
Reply to comment by [deleted] in Fast radio burst linked with gravitational waves for the first time by spsheridan
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danielravennest t1_je6fqtg wrote
Reply to comment by SpectralMagic in Webb telescope finds a 'hot Jupiter' exoplanet that defies expectations by maki23
Even low-grade hobby telescopes are polished to 1/16 micron (2.5 millionths of an inch). Serious telescopes are several times more accurate. Optics inherently have to be very precise.
[deleted] t1_je6doda wrote
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ErikGoesBoomski t1_je6cxt2 wrote
Reply to comment by afraid_of_zombies in More Water Found on Moon, Locked in Tiny Glass Beads by LanceOhio
Just in forms that cannot be used.
[deleted] t1_je69thv wrote
Reply to comment by ChronicSchlarb in My camera setup on the International Space station. More details in comments. by astro_pettit
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[deleted] t1_je63mm1 wrote
Reply to comment by July_is_cool in Department of the Air Force Secretary: ‘Haven’t made a decision on U.S. Space Command’ by Corbulo2526
Everything I've heard about MDA is in general a disaster, I don't think it was the move though.
Everyone seems incredibly toxic and its just asses in seats mentality.
IthotItoldja t1_je61jkw wrote
Reply to NASA Missions study what may be a 1-In-10,000-Year Gamma-ray Burst, the most powerful class of explosions in the universe. On Sunday, Oct. 9, 2022, a pulse of intense radiation swept through the solar system so exceptional that astronomers quickly dubbed it the BOAT – the brightest of all time. by ICumCoffee
1 in 10,000 year GRB seems like a stretch, we've only been able to detect them for a few decades.
cjameshuff t1_je6137m wrote
Reply to comment by [deleted] in Can we make Mars's magnetosphere stronger? by HuygensCrater
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.
[deleted] t1_je5zek7 wrote
Reply to comment by cjameshuff in Can we make Mars's magnetosphere stronger? by HuygensCrater
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July_is_cool t1_je5ylkr wrote
Reply to comment by [deleted] in Department of the Air Force Secretary: ‘Haven’t made a decision on U.S. Space Command’ by Corbulo2526
When they tried to move the MDA headquarters to Huntsville it was a disaster.
[deleted] t1_je5y6yq wrote
Reply to comment by HuygensCrater in Can we make Mars's magnetosphere stronger? by HuygensCrater
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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.
hirsutesuit t1_je5x0jm wrote
Reply to comment by Dzhone in Webb telescope finds a 'hot Jupiter' exoplanet that defies expectations by maki23
I don't think there's any way to actually determine the spin rate (day length) of exoplanets at this time so they would be talking about Earth days.
Also planets near stars are easier to spot so a super-short orbit is expected.
It can just be confusing which days we're talking about.
HuygensCrater OP t1_je5wj53 wrote
Reply to comment by ___77___ in Can we make Mars's magnetosphere stronger? by HuygensCrater
What if we nuke the core or do something to make it spin again?
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.
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".
TheBigNook t1_je6shh7 wrote
Reply to As an avid lover of the cosmos, is it realistic to expect space tourism and a mars and moon resort before I die? by EarthInteresting9781
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.