Capturing time on a photo still amazes me. Capturing the accumulated light blows my mind.

Headline: Earth faces a Black hole, World is relieved from mass destructive.

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That's due to our atmosphere. If you were on a body without an atmosphere that effect would be eliminated.

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Amazing photo! I was wondering what camera/setup do you use?

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I'll never forget seeing this as a kid. Imagine wrapping up Final Fantasy VII then walking outside to see this. Kinda made me want to have someone check on the northern crater.

>This will mean it will probably never form a structure like a star but even if the densities got that high

Can you explain more about this? What's to stop it forming dark planets? (I understand they're being no stars under the assumption that it can't form element/element-like particles)

No there is no independent verification, they paid a test house to go work in their chamber and afaik none of the alleged independent people who looked at it have been named. This is not independent testing.

I have always had some strange draw to the Andromeda galaxy. I am not a spinner, nutjob psychic or crystal rock rubber. Lol. Its just a weird connection. Idk, maybe I am tripping

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But DARPA has thrown some money into the ring and it's worth mentioning it has been shown to produce thrust in line with predictions apparently to the satisfaction of independent testing facility, it's a head scratcher, I don't claim to understand it at all. But I will watch with interest, if proven this really is something new.

Yeah I see your point. It was late and I was falling asleep and didn't read it right. Also said need instead of neat for what it is worth.

How do we know the slowing of these stars is caused by dark matter as opposed to the effects of time dilation as a result of a decaying orbit around a black hole?

u/Andromeda321 any thoughts on this one?

He can up his game by taking photos on a spacewalk.

Actually, all of those cameras have a remote, could you just stick them to the outside of the windows?

There's some good animation and illustrations here.

Ah yes, light pollution sucks. The biggest difference in dark places is that instead of looking gray and washed out, the sky looks closer to black and you can see the dust lanes in the milky way. It's still an incredible sight, you just don't get the crispness and color that a camera can capture.

Sure, but in the model of "it's a barren, atmosphere-less planet close to its parent star", it's quite like an Earth-scale version of Mercury.

Trappist-D, -E, and -F might all be habitable. E has the best chance.

mercury is almost twice as hot.

it's trappist d we care about anyway

In landscape astrophotography it's very common practice to shoot the sky and ground separately. For the sky exposure you use a star tracker that locks onto the sky as it rotates to prevent the stars from trailing (which of course causes the foreground to be blurry). Then you shoot the foreground without the tracker and line them up the way they would have if it was a single exposure.

That’s awesome. Thanks for sharing! I saw a similar thing when I was in Santa Fe once, but there was a fair amount of light pollution so I wasn’t really sure how that compared to these “truly dark” places out there

You’re missing a lot of the easy physics to this. Photons can (mostly-or maybe entirely) pass through dark matter for the same reason neutrinos can pass through earth. Dark matter must not couple strongly to the electromagnetic force. This is not terribly surprising. It just means dark matter must be (electrically) neutral. It also can’t couple strongly to the weak or strong force (otherwise it would be easy to observe). This again isn’t terribly shocking (a low coupling is easy to put in). Therefore, we know dark matter only interacts strongly through gravitation. This will mean it will probably never form a structure like a star but even if the densities got that high, it wouldn’t result in fusion since there no reason to believe dark matter is capable of forming hydrogen/helium analogs. There are some people who talk about a “dark QED sector” which would have dark photons and other things but so far nothing we’ve tested for dark matter has panned out and this is where the interesting physics lies.

MACHOs (massive objects like black holes) have been pretty conclusively ruled out by lensing studies. Which leaves us with particles (WIMPs and axions being the most discussed).

This video is the closest comparison I have to what the naked eye sees in dark skies like this.

That's significantly different from previous models, which suggested it was more akin to Venus. This is more like a super-sized Mercury.