astronomy

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chemical_cutthroat, w Astronauts To Patch Up NASA’s NICER Telescope
@chemical_cutthroat@lemmy.world avatar

Finally, we’ll have the NICEST telescope.

PrincessLeiasCat, w The great commercial takeover of low Earth orbit

sigh

very_well_lost, w The great commercial takeover of low Earth orbit

Looks like the article is paywalled… anyone got a mirror?

14th_cylon,
Flyberius, w The great commercial takeover of low Earth orbit
@Flyberius@hexbear.net avatar

I bet they can’t. I’m sure they’ll get a lot of venture capital before they fail though.

hperrin, w Astronomers discover Milky Way’s biggest stellar black hole – 33 times size of sun

33 times the diameter, volume, or mass?

Nm, it was in the actual headline. The mass is the answer.

Mikufan, w BepiColombo Detects Oxygen and Carbon Ions in Magnetosphere of Venus

Carbon is pretty common but Oxygen? That stuff is exclusively made by life here on earth…

Daxtron2,

😂

N_Crow, w BepiColombo Detects Oxygen and Carbon Ions in Magnetosphere of Venus
@N_Crow@leminal.space avatar

So, Aliens right?

Olap,

Yup. Combined with phosphene it’s looking more and more likely. But still faaar from proven

very_well_lost,

In this case, the carbon and oxygen are coming from a much more mundane source: the solar wind.

When high-energy particles from the solar wind collide with molecules in Venus’ upper atmosphere, they carry enough energy to break some of those molecules into their constituent atoms. Since the Venusian atmosphere is almost entirely CO2, you should expect this process to generate C and O ions — which is exactly what we’ve now observed!

Faresh, (edited )

If life is proven to exist on Venus, it would be really exciting. Besides the obvious reason to be excited there’s also my thought: If in this planetary system two planets out of 98 have life on them, then that would mean that life isn’t as rare as we conceived it to be.

Edit: Had the tab open for a while without refreshing before posting, so I didn’t see the comment that says it’s just solar wind. :(

will_a113, w Advanced solar sail mission prepares to catch the wind in the void of space

The interesting part of the article:

The new flexible polymer and carbon composite boom is coupled with a twelve-unit (12U) CubeSat built by NanoAvionics. After the mission launches atop a Rocket Lab Electron rocket from the company’s Launch Complex 1 in Māhia, New Zealand, the spacecraft will go into a Sun-synchronous orbit at an altitude of about 600 miles (~1,000 km) and the sail will deploy in about 25 minutes to cover an area of 860 ft² (80 m²) with the boom unfolding from the size of a hand to 23 ft (7 m) long. Once deployed, the sail will adjust the vehicle’s orbit by angling itself in relation to the solar wind.

Atelopus-zeteki,
@Atelopus-zeteki@kbin.run avatar

Yar! Sailing the Solar Winds! TBH, been waiting for this since I first heard of solar sails. Yay, ingenious tool using primates!!!

tiredofsametab, w Car-size asteroid discovered 2 days ago flies 30 times closer to Earth than the moon

I know that's not how the phrase is meant to be read, but I can't unsee it as it flying separately by the earth and the moon and deciding to buzz one of the two a bit closer.

Serinus,

Than vs then.

tiredofsametab,

Hrm, so there's a third interpretation.

atzanteol, w Car-size asteroid discovered 2 days ago flies 30 times closer to Earth than the moon

“30 times closer than the Moon” 🙄

Around 12 thousand miles (19.3 thousand kilometers).

bigbadmoose,

Missed it by this 🤏 much

JoMomma,

12k miles is very close, the headline is using ridiculous comparisons, but 12k is closer than many medium and high orbit satellites.

en.m.wikipedia.org/wiki/Medium_Earth_orbit

halcyoncmdr,
@halcyoncmdr@lemmy.world avatar

Which on the scale of the solar system is essentially the width of a damned hair. We have satellites in higher orbits than that.

Diplomjodler3,

How much is that in elephants?

jam12705,

I’m not up to date on the latest elephant measuring units but we’re talking at lease 7.8million horse lengths away of that helps.

If you’re looking for greater accuracy we can always convert that to badgers with a simple formula.

acockworkorange,

Rude to call your mom that.

someguy3, w Car-size asteroid discovered 2 days ago flies 30 times closer to Earth than the moon

Is that big enough to not burn up in the atmosphere?

atzanteol,

This means it’s an asteroid with a weight-class that would have burned up in Earth’s atmosphere, if its orbit happened to intersect ours more directly.

dellish,

So… Asteroid that would have burned up in the atmosphere will miss us instead. I guess that’s good news?

atzanteol,

Livescience is 90% over-hyped nothing.

Shdwdrgn,

A quick search suggests that something as small as 5 meters can survive hitting the ground, however there are a number of calculations to consider including the speed it is traveling, the entry angle, and the material it is made of.

XeroxCool, w Total Solar Eclipse - From 30 Years to 3 Minutes & 20 Seconds

I have such mixed feelings about all the time I spent with my cameras during the event. By time I realized I had no practice with the camera and eq mount for daytime use, it was cloudy the whole time at home. Totality is not something you can reasonably practice anyway. So yeah, I have a few cool totality pictures with varying detail and a couple hundred showing the partial phases… But for what? They’re not as good as many other amateurs, let alone professionals. If there was ever a time to deal with the hassle of raw photos, it was then. Part of why I gave up on most astrophotography is because the best I could possibly do is simply match it to scientific equipment. It’s cool to do it, but there’s no personalization. Instead, I look more for nightscapes or wide angle really detailed starfields. I’m still conflicted as to whether or not I experienced it properly. I got to show the pics to some people passing by after, assuming I was the go-to person for info on what they experienced, something I love about night time astronomy, but those aren’t such time-limited events.

I’ll probably revel in memories whenever I actually flip through the pictures. But, personally, I don’t think it was worth spending so much of my time getting pictures of a black hole in a black background rather than just letting my mark 1 eyeballs observe the hole in the blue-fade skies.

However, the one piece I absolutely would bring every single time again is binoculars. Maybe that’s why I feel like I didn’t see the eclipse. The view in my 10x binos was so incredibly detailed, the memory matches the stacked and tweaked pictures. I could see more than just the big laser-don’t flare on the bottom, I saw at least 3. Just unreal, no sight in my life before could explain it. A cartoonishly large corona with a black hole in a black background. Maybe I just couldn’t comprehend.

The light effects near totality were certainly something to experience. Decades of experience being in sunlight just didn’t jive with what the sun was doing then. It was more akin to a distant white streetlight rather than a sun. It dimmed and crisped shadows unlike a sunset by not turning orange and blurring of the edges.

I’m glad you had the emotional experience I was expecting to have.

Kichae,

Yeah, my photography issues were similar, re: unfamiliar context. I’m still puzzled as to why the quicksetting menu works totally differently when using it in mirrorless mode. But oh well. There’s always… 2044??? Oh, crap.

I admit, other than a better lens with a tighter view, the bits of equipment I really wished I’d invested in were a tracking motor and a shutter remote. I paid zero attention to my camera during totality, but I still had this nagging voice in the back of my head telling me that I should check my centering, and I didn’t need that.

XeroxCool,

To potentially save you the confusion I had, the next popular one in North America will really be 2045. They’re both in August, but the 2044 TSE is a relatively short, northerly event with totality ending in Montana at sunset. Meanwhile, 2045 is more akin to the 2017 path, passing from California to Florida.

Zoomboingding,
@Zoomboingding@lemmy.world avatar

Yeah, not much of an emotional reaction from me, beyond a slightly incredulous laugh and an extended wow punctuated by gawking in awe. Definitely should have brought my 'nocs!

essteeyou, w Total Solar Eclipse - From 30 Years to 3 Minutes & 20 Seconds

“Hovering in the sky over Potato World” is up there in the top ways to start a sentence.

Glad you had a great experience!

Kichae,

I didn’t plan to view the eclipse over Potato World, but arriving at the hotel and discovering that it was next door did seem like a sign from the universe.

Murdoc, w Huge star explosion to appear in sky in once-in-a-lifetime event

I wonder if there’s a way to get an alert or something so I don’t miss it. I tried searching for one but so far no luck.

Sunsethughes, w After 30 years, I'm finally going to see a total solar eclipse. Also, Potato World is a thing.

Dude! I saw the eclipse from Bouctouche and my God it was incredible. Please let us know what you thought!!

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