Space space

NASA representation of a black hole consuming a star

NASA representation of a black hole consuming a star

I've seen this animation couple of times before. Looks weirdly satisfying despite the star is basically gobbled up.

For those curious:

This event happened in the galaxy PGC 043234, ~290 million light years away

When a star comes too close to a supermassive black hole, the intense gravity of the black hole results in tidal forces that can rip the star apart. Some of the stellar debris is flung outwards at high speeds, while the rest falls towards the black hole.

This accounts for the “tearing” of the star (why the black hole doesnt eat it whole) and the cloud of dust and debris gravitating around it.

< 10 years it seems

Scientist theorize that there it takes 10k years for photons generated by nuclear fusion to make their way through the incredibly dense and packed layers of the Sun to the surface. As the blackhole disrupts the Sun and causes fusion inside the Sun to cease, or to get unstable before the ceasing, we'd probably get bursts of radiation and light as the Sun's internal structure is perturbed by the black hole's gravity. These bursts will also probably be followed by incredible solar flares. It's likely that we could get bathed in charged plasma, in which case we could see the auroras flare up to a point where it will be hard to sleep at night from the brilliance of them.

It's hard to tell from this small video of the scale we would be looking at regarding the Sun getting pulled in and eaten. It's quite possible that whatever entry vector the black hole enters our solar system and gets gravitationally bound to the Sun, that when it comes apart that we could get steadily bathed in superheated Solar Plasma. It's possible the Earth burns up, or at least our atmosphere gets super-heated and scorches everything on the planet before we get a chance to freeze from losing our solar campfire in the middle of the Solar System. Or there's so much solar plasma that the Earth gets struck by super-powerful lightening bolts originating from space due to static electricity on levels far beyond anything we've ever seen before.

But like others have said, it's also likely that the weird dynamic of throwing in something 5-15 times our Sun's mass could eject us out of the Solar system. Besides how that would affect the Earth's ability to hold together or go crazy tectonically, once the Sun stops producing the majority of the heat we get, everything on Earth will freeze within a week or so. The atmosphere will get denser and closer to the Earth which each passing day, until the Oceans freeze over who-knows-how-thick, until volcanism is all that's keeping the deepest reaches unfrozen. The last to remain alive will be people with nuclear power and tanks of propane to heat their houses, and eventually they will be gone too.

Black hole effect on nearby stars

Black hole effect on nearby stars

"At the closest point this star was at a distance of less than 20 billion kilometres from the black hole and moving at a speed in excess of 25 million kilometres per hour — almost three percent of the speed of light."

I'd love to know how fast was that star going at the closest point of it's orbit around the black hole.

What’s going on with the stars that appear to get charged or radiate at the same time?

For reference, Pluto is on average around 6 billion km from the Sun.

I captured this image of SpaceX's Falcon 9 rocket landing at Vandenberg Air Force Base last week using a sound-activated camera placed near Landing Zone 4!

I captured this image of SpaceX's Falcon 9 rocket landing at Vandenberg Air Force Base last week using a sound-activated camera placed near Landing Zone 4!

Nice photo! How does the sound activated camera work, does it just take one image, or a burst?

I can almost guarantee you he will be trying to get as many pictures as possible (you have no control once everything is set and you can't go back to the camera for the launch, so you might as well get as many chances at a good photo as possible), so probably continuous shooting until the decibel level drops off, maybe set to continue shooting a bit beyond that.

The camera will continue firing images at its native framerate when the sound is at a certain threshold

It looks like one of those Space Age sci-fi artworks found during the 50s and 60s. Look at how much humans have accomplished since then.

Watching the SpaceX Falcon9 launch with our boxer puppy, Kona. Excited to have this photo featured as yesterdays NASA APOD

Watching the SpaceX Falcon9 launch with our boxer puppy, Kona. Excited to have this photo featured as yesterdays NASA APOD

You look like the last two remaining people (and last dog) on earth as you watch the final transit of humans to another world.

You can also take it the other way around and say they are the first family of human settlers on a foreign planet, watching the first ship returning to Earth :D

I like that one : )

I've been lucky enough to have a few photos featured as the NASA APOD before, but this is definitely a personal favorite. Getting to share the moment (and photo!) with Rachel and Kona made this extra special to me. I was incredibly excited when I got the news on this! I wrote a bit more about the photo here - https://www.jackfusco.com/Blog/NASA-Astronomy-Picture-of-the-Day-10132018 If anyone is interested in checking that out or following along on IG www.instagram.com/jackfusco I talk a bit more about it on the blog, but figured I'd include camera and settings here, too! Sony A7RII - Sigma 14mm f1.8 ART 1/4" | ISO3200 | f1.8 (Much shorter than usual night sky settings to keep Kona from being blurry!) Dell XPS 15 2-in-1 Location: Solana Beach, San Diego, California

Milky Way over the Bowling Ball Beach in Northern California

Milky Way over the Bowling Ball Beach in Northern California

Beautiful shot.

Also, those boulders look exactly like xenomorph pods right down to the mist.

Some backstory for this image:

These strange spherical boulders on the Mendocino coast in Northern California are revealed only during low tide. Resembling bowling balls they are actually called concretions and were formed as the softer surrounding sandstone was eroded by the Pacific Ocean over millions of years.

There's at least four conditions that need to be satisfied to make this photo possible. First the right time of year - the galactic core of the Milky Way is only visible during the summer season (April to September). Second is the phase of the moon - around new moon is best so that the light from the moon doesn't wash out the Milky Way. Third - the tide needs to be low otherwise the boulders are completely submerged. Finally the weather - during the summer this area is often engulfed in fog resulting in poor visibility. On Sunday night all these factors were favorable so I decided to make the 8 hour long roundtrip from San Francisco Bay Area where I live.

If you like the image I post more to http://instagram.com/mrcnzajac!

Came here to say this.

Thought I might be looking at some new promo material for a new alien movie

Anyone think this looks pods from Aliens getting ready to open?

Planet Size Comparison - Jordan Turner

Planet Size Comparison - Jordan Turner

I think you are off on Jupiter in regards to Saturn but this is very nice.

I thought the same thing. Although I've never seen either in person.

Isn't the sun off by a few orders of magnitude?

Nice, a graphic comparing the size of planets without using the proper size of planets...

Man-Made Space Debris 1957-2016

It's important to remember this makes it look much worse. Space even just around Earth is massive and these objects are ridiculously small in comparison. Its not like you're dodging them left and right travelling up to space. The dots just have to be increased in size so you can actually see them.

It's similar to asteroid belts as depicted in art versus the reality.

Source

Shows each of the 41,000 man-made objects that have been tracked since 1957. By the end of the simulation there are just over 17,000 trackable objects in orbit with less than 10% of those active satellites. Everything else is debris. The tracking data covers objects over 10cm in size. Color indicates time in orbit: yellow < 5 years, orange 5-10 years, purple > 10 years.

, Dr. Stuart Grey

edit: as many have noted, these are objects over 10cm in size. So the points are wildly exaggerated in scale in order to visualize it.

Or the rings of Saturn which we've had probes fly through without issue.

"Belka" and "Strelka" a.k.a the first Earth-born creatures to go into orbit and return alive [1960]

"Belka" and "Strelka" a.k.a the first Earth-born creatures to go into orbit and return alive [1960]
After the flight they were sent to the Soviet State Research and Test Institute of Aerospace Medicine to be closely monitored. Strelka found a mate there few months later and gave birth to six puppies. Khrushchev gave one of them, named Pushinka, to Caroline Kennedy as a gift.

They spent rest of their lives touring schools and died of old age years later. Their preserved bodies are currently at the Memorial Museum of Cosmonautics in Moscow.

After the flight they were sent to the Soviet State Research and Test Institute of Aerospace Medicine to be closely monitored. Strelka found a mate there few months later and gave birth to six puppies. Khrushchev gave one of them, named Pushinka, to Caroline Kennedy as a gift.

They spent rest of their lives touring schools and died of old age years later. Their bodies are currently at the Memorial Museum of Cosmonautics in Moscow.

Might have been more interesting to see if there were any long term effects.

Strelka means 'Little Arrow' One of her pups was given to President Kennedy as a gift afterwards.

I wonder why they haven't been dissected right after landing, to see if there any abnormalities or organ damage after such a journey. It's nice they didn't.

Star color is a function of surface temperature

Star color is a function of surface temperature

One of the sad things about sorting by new is you don't get to enjoy the sideshow of people complaining that the sun isn't that colour.

Because they are binary stars, basically two stars orbiting around each other. All planets in that star system will orbit around the gravitational center.

Not just by definition. Look at the sun (or rather its vicinity, to avoid eye damage) at noon and it's clearly white.

Isn't the sun 'white'/neutral by definition?

Japan: 4.5 billion year old meteorite slams into a home. The space rock, which landed on a private home in Komaki, 250 km southwest of Tokyo, split into several pieces before reaching its final destination.

Japan: 4.5 billion year old meteorite slams into a home. The space rock, which landed on a privat...

This is why I keep a weakly magnetic sphere on a string in case this happens to me.

Fell from space onto a Japanese home. Where are the tentacles?.

This was formed around the same time as our Moon.

4.5 BILLION years old?! Jeez take a moment to think about how old that rock is...older than the ancient Egyptians....older than homo erectus....older than any marine life as we know it....holy cow.

Try one of these subthreads