astronomy

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JackGreenEarth, in Mars Society proposes institute to develop tech needed for Red Planet settlement

We should leave Mars red and only set up scientific research stations there, like Antarctica, while we set up living spaces in large spinning space stations. That is the technology we need to develop.

UpperBroccoli,
@UpperBroccoli@feddit.de avatar

And so it begins.

JackGreenEarth,

What do you mean by that?

UpperBroccoli,
@UpperBroccoli@feddit.de avatar

What you described sounded a bit like Babylon 5, so I felt the need to reply with a quote from one of its more famous denizens, Vorlon Ambassador Kosh.

XeroxCool, in The Hubble Imaged Some Globular Clusters in an Unusual Place: Near the Milky Way's Centre

That’s a neat correlation between a galaxy’s smbh mass and total gc mass - about the same. Also interesting to see that the stars in a cluster don’t have to be related in age or composition at all.

If you don’t know, GCs can be faintly visible with “normal” binoculars. 7x35, 8x42, and 10x50s are popular handheld choices. 20x50s aren’t good at night. The Hercules Cluster is a good one right now so check it out this month when you have clear skies. The Wild Duck cluster is more open but looking towards the core is always a treat. The Lagoon nebula is close to there. Definitely look for the Orion Nebula in his sword sometime this winter. Check star maps/apps if you’re in the southern hemisphere since I’m in the northern and not sure what carries over. Light pollution sucks but at least by me, suburbs more than 10 miles out of an interstate/highway corridor tend to be dark enough. There’s light pollution maps for that too

wjrii, in Webb Discovers Methane, Carbon Dioxide in Atmosphere of K2-18B (nasa.gov)
@wjrii@kbin.social avatar
vzq, in The European Space Agency has a transparency problem — but it's completely legal

That goes for many pre-Maastricht treaty institutions. They are essentially lawless fiefdoms.

There’s no obvious way to change this without amending the original treaty.

spittingimage, in How Might Life Migrate Through the Universe?
@spittingimage@lemmy.world avatar

I read this same article yesterday and imagined the galaxy blooming with life in the Earth’s wake… tardigrade life.

Crackhappy, in This week, NASA will be sharing details on how it's preparing to receive the first set of asteroid samples ever gathered by the agency, an achievement seven years in the making.
@Crackhappy@lemmy.world avatar

I remember this movie based on the Michael Crichton book. In seriousness though I’m excited for this!

Ghyste,

The Andromeda Strain. Amazing book.

btaf45, in How many constants define our Universe?

No, this not a repost. It is a brand new version (as of yesterday) of the older article by the same author posted a week ago. Spoiler alert: no new constants have been found.

Gloomy, in It’s Time To Retire The Super-Earth, The Most Unsupported Idea In Exoplanets [2021]
@Gloomy@mander.xyz avatar

This tells us something remarkable and unexpected to many: Earth, the largest rocky planet in our entire Solar System, is almost as “super” as a rocky planet can get. If you managed to form an Earth-sized planet early on in your Solar System’s history, it would only need to get a little bit larger and more massive before it became capable of hanging onto volatile molecules like ammonia, methane, and even hydrogen and helium. And once you become rich in volatiles, you’re guaranteed to no longer be rocky, but rather more like Neptune, with a large gas envelope around you.

This I find very interesting. How many definetly rocky Exoplanets have we discovered so far? Or at the Exoplanets we have found so far alla gas giants?

kowcop, in NASA identifies 17 planets with possible subsurface oceans, and they could be fit for life

It will just take 34,000,000,000 years to get there in a spaceship built from the cheapest parts possible

homesweethomeMrL, in NASA identifies 17 planets with possible subsurface oceans, and they could be fit for life

“Fit for life”? Bubba, let’s get this crystal clear - you were born here and you will die here. Maybe stop murdering your current planet first before you get all het up about murdering another one.

Fit for life, FFS. Yeah, yeah I’m sure it’s all theoretical and academic but let’s just put that to rest now. Elmo’s spacewagon ain’t for you.

cyberpunk007, in Every planet in our solar system explained

Ah yes. I learned Venus is earths future.

“The atmosphere is extreme due to the greenhouse effect which filled the planet with carbon dioxide.”

kalkulat, in Astronomers Spot a Disk Orbiting a Star in Another Galaxy For The First Time Ever
@kalkulat@lemmy.world avatar

Aw shucks, for ‘disc’ I read ‘planet’. And ‘Large Magellanic Cloud’ is a close neighbor. But hey, it’s a start.

instamat, in Inside NASA’s bid to make spacecraft as small as possible

Put astronauts in an iron man suit and fire them from a cannon.

Pizza_Rat, in Mars Needs Insects

That’s neat!

Shdwdrgn, in Scientists detect a cosmic ray that’s almost as powerful as the ‘Oh-My-God’ particle | CNN

The described impact of one of those particles got me thinking… I wonder how many “ghostly” encounters have been recorded in history that could be attributed to one of these particles actually hitting someone? I’ve seen several things on TV where the recorded sensation was like being punched in the gut, or ‘god’ tapping someone on the shoulder and driving them forward. However I’m a bit confused from the article – I’m not sure if this particle would travel right through you since it’s subatomic, or if it would actually feel like something hit you. Still, it’s fun to ponder.

aBundleOfFerrets,

These particles split into a crap ton of lower energy ones when they hit the edge of the atmosphere, nothing that makes it to humans has enough energy to be felt, even if they interact with you. (they probably won’t)

Zaphod,

I’ve seen a Veritasium video about this where he said you can see flashes of light if these particles hit your retinas while your eyes are closed.
Apparently astronauts experience this a lot

Claidheamh,

They do, because there is very little atmosphere to shield them from it.

Shdwdrgn,

Ah well, it would have been an interesting explanation for ghost stories.

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