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Old 08-21-2019, 10:07 AM   #3381
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Very cool


https://www.cbc.ca/news/technology/n...wave-1.5253566


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irst, astronomers made history when they detected a gravitational wave from two black holes merging. Then it was two neutron stars. Now, astronomers believe they've detected a gravitational wave coming from another first-time discovery: a black hole swallowing a neutron star.


Both of these objects — a neutron star and a black hole — are mind-blowing cosmological objects. A neutron star is just the size of a small city but with mass so great that just a teaspoon of its material would weigh 10 million tonnes.


A black hole, on the other hand, is a point in space that isn't made of material at all, but is pure space-time, where, once something crosses its threshold — such as light — it can never escape.



When these two colossal objects meet, something has to give. And in this case, it was the neutron star.
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Old 08-21-2019, 10:08 AM   #3382
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Old 08-23-2019, 12:58 PM   #3383
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A black hole, on the other hand, is a point in space that isn't made of material at all, but is pure space-time
Scientists don't really know what is in a black hole, most actually believe there is matter in it but it's been squeezed into such a tiny space that it creates gravity so strong that even light can't escape it's pull, it's like a neutron star on steroids.
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Old 08-23-2019, 01:41 PM   #3384
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https://metro.co.uk/2019/08/23/monst...arth-10620660/


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Old 08-24-2019, 04:03 PM   #3385
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If 3.3 million miles is considered "skimming earth" what do you call Apophis and it's 19k from earth

https://upload.wikimedia.org/wikiped...-20190429.webm

If you happen to be superstitious Apophis is due on April 13 2029...a friday

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Old 08-25-2019, 12:01 PM   #3386
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Stupid question, but can asteroids change course slightly or are scientists able to accurately predict it to 19kms?

Like could that 19kms change to 0kms in the next ten years?
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Old 08-25-2019, 12:15 PM   #3387
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Newton is Newton and orbital mechanics are orbital mechanics. To change course something would have to influence it via gravity or striking it, and anything large enough to do that is probably known. And if something did change it the ways it can be changed to be further from earth are vastly larger than the few ways it could be changed to hit earth. Highly unlikely in other words.
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Old 08-25-2019, 12:18 PM   #3388
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Stupid question, but can asteroids change course slightly or are scientists able to accurately predict it to 19kms?

Like could that 19kms change to 0kms in the next ten years?
Technically it could. The odds of it happening would be astronomical though.

There was a possibility (since ruled out) that Apophis could pass through a gravitational ‘keyhole’ that would line it up with earth 11 years later. It would need to have something alter its path due to gravity (unknown object large enough, super unlikely) or get bumped (even less likely). So in closing: it would need a force exerted on it that hasn’t been calculated. They don’t have a mistake on the track path.

The reason it’s highly unlikely is this: one day the Milky Way galaxy and the Andromeda galaxy are going to merge. When that time comes, it is likely no planets or stars collide.

Space is humongous big.
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Old 08-25-2019, 03:04 PM   #3389
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Technically it could. The odds of it happening would be astronomical though.

There was a possibility (since ruled out) that Apophis could pass through a gravitational ‘keyhole’ that would line it up with earth 11 years later. It would need to have something alter its path due to gravity (unknown object large enough, super unlikely) or get bumped (even less likely). So in closing: it would need a force exerted on it that hasn’t been calculated. They don’t have a mistake on the track path.

The reason it’s highly unlikely is this: one day the Milky Way galaxy and the Andromeda galaxy are going to merge. When that time comes, it is likely no planets or stars collide.

Space is humongous big.
Listening to a podcast there still is a slight concern as apparently it does a flyby near Venus in 2026, they're not sure if or how much it's gravity will effect it's path but be sure they'll be re-calculating.
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Old 08-25-2019, 03:33 PM   #3390
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Stupid question, but can asteroids change course slightly or are scientists able to accurately predict it to 19kms?

Like could that 19kms change to 0kms in the next ten years?

It's not 19 km, it is 19,000 miles.
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Old 08-25-2019, 04:49 PM   #3391
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It's not 19 km, it is 19,000 miles.
Ah, figured that would that would be too close, lol. I didn't click Huntingwhale's link just went by what he typed.
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Old 08-27-2019, 04:07 PM   #3392
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SpaceX just did a cool test of their Starhopper rocket. It went up 150m, hovered and then came down on another pad a short distance away.

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Old 08-30-2019, 10:42 PM   #3393
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https://www.opb.org/news/article/ore...north-america/

New findings indicate that the first people to arrive in North America may have come by boat and not across a land bridge.
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Old 08-31-2019, 11:33 PM   #3394
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https://twitter.com/user/status/1168022589089824771
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Old 09-01-2019, 07:12 AM   #3395
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They're calling that meteor "Oilers playoff hopes", because it went down in flames

Sent from my Pixel 3 using Tapatalk
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Old 09-06-2019, 03:13 PM   #3396
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India has lost contact with the lander they tried to land on the moon today.

https://www.nytimes.com/2019/09/06/s...gtype=Homepage
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Old 09-10-2019, 12:05 PM   #3397
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https://twitter.com/user/status/1171481548924702721
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Old 09-10-2019, 12:11 PM   #3398
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Haha, it has a maple leaf on it!
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Old 09-12-2019, 10:12 AM   #3399
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https://twitter.com/user/status/1172178875721441280


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Old 09-12-2019, 10:44 AM   #3400
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Water found on a potentially life-friendly alien planet

A super-Earth about 111 light-years away is “the best candidate for habitability that we know right now,” astronomers say.

https://www.nationalgeographic.com/s...kepler-k2-18b/

exoplanet K2-18b
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