Given our current state of readiness, would we have any recourse if this thing were on a collision course with Earth? It's going really fast, and since momentum is mv², it would be packing a punch!sillyworm2 wrote:Someone is hurling stones at us.
Search found 11 matches
- Tue Nov 07, 2017 1:14 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A/2017 U1: An Interstellar Visitor (2017 Nov 03)
- Replies: 42
- Views: 13200
Re: APOD: A/2017 U1: An Interstellar Visitor (2017 Nov 03)
- Tue Nov 07, 2017 1:08 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Dust Jet from the Surface of Comet 67P (2017 Nov 06)
- Replies: 19
- Views: 9953
Re: APOD: A Dust Jet from the Surface of Comet 67P (2017 Nov 06)
Wow. Seeing the surface of a comet! Pretty jet of tail-stuff! When I was born 77 years ago we knew so little about any solar system denizen. We thought Mercury's rotation period was the same as its orbital period. I remember heartbreak when I read in the Toronto Globe and Mail that radio astronomer...
- Tue Nov 07, 2017 1:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Dust Jet from the Surface of Comet 67P (2017 Nov 06)
- Replies: 19
- Views: 9953
Re: APOD: A Dust Jet from the Surface of Comet 67P (2017 Nov 06)
Same here. I find the nebula and galaxy pictures interesting, but I like the pictures of solid bodies better.melrod wrote:Pictures like this give me a sense of relatable place compared to the grandeur of a galaxy or wondrous enormity of a nebula.
- Mon Mar 07, 2016 11:41 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Mystery Feature Now Disappears in... (2016 Mar 07)
- Replies: 32
- Views: 6008
Re: APOD: Mystery Feature Now Disappears in... (2016 Mar 07)
I like the small circular shape top center. It looks like a crater remnant with a small peak.
- Fri Feb 19, 2016 7:35 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: LIGO Detects Gravitational Waves (2016 Feb 11)
- Replies: 115
- Views: 30408
Re: APOD: LIGO Detects Gravitational Waves (2016 Feb 11)
Would any of this energy be converted to radiation? So for example, you detect a gravity wave, get an idea of where to look, then see the radiation pulse follow it? Follow it because presumably gravity waves travel unimpeded, while radiation has the intervening intergalactic medium to slow it down.
- Sat Jan 23, 2016 10:34 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Big Dipper, Deep Sky (2016 Jan 23)
- Replies: 18
- Views: 6669
Re: APOD: Big Dipper, Deep Sky (2016 Jan 23)
When I click the image then zoom in, what strikes me are how many similarly bright stars are aligned in short arcs. Is that just an optical illusion, like my brain trying to find patterns in randomness?
- Mon Mar 02, 2015 3:53 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Lenticular Cloud, Moon, Mars, Venus (2015 Mar 02)
- Replies: 17
- Views: 51423
Re: APOD: Lenticular Cloud, Moon, Mars, Venus (2015 Mar 02)
This is a point, near the top, about one quarter of the way in from the right.
At first I thought it was Mars because it was slightly orangish.
Anyone know what that is?
I like zooming in for the Jupiter "dots", seeing those satellites in a row is so cool...
At first I thought it was Mars because it was slightly orangish.
Anyone know what that is?
I like zooming in for the Jupiter "dots", seeing those satellites in a row is so cool...
- Fri Nov 28, 2014 3:00 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galileo's Europa Remastered (2014 Nov 27)
- Replies: 19
- Views: 161511
Re: APOD: Galileo's Europa Remastered (2014 Nov 27)
Where is that very clear evidence of present life on Mars? Ann It would be erroneous to expect a teeming biosphere on Mars. If the deserts of Antarctica by comparison are a tropical paradise, and life is just barely surviving in that environment with billions of years of evolution behind it, then w...
- Thu Nov 27, 2014 9:12 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galileo's Europa Remastered (2014 Nov 27)
- Replies: 19
- Views: 161511
Re: APOD: Galileo's Europa Remastered (2014 Nov 27)
I've read that the meteor impact that killed the dinosaurs is estimated to have deposited in the order of a tonne of material on the Gliese 5 planets, so if there wasn't life there before, there is now. However, some simple analysis reveals that this is complete nonsense. You could vaporize the ent...
- Thu Nov 27, 2014 5:47 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Galileo's Europa Remastered (2014 Nov 27)
- Replies: 19
- Views: 161511
Re: APOD: Galileo's Europa Remastered (2014 Nov 27)
My guess is that all potentially habital bodies will have life. "Life" being bacterial or similar organisms, which is what 99+% of scientists mean. The reasoning is that life appeared very early in Earth's history, basically as soon as life could fossilize, we see fossils. Whether it cames...
- Wed Sep 10, 2014 4:19 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Laniakea: Our Home Supercluster of... (2014 Sep 10)
- Replies: 64
- Views: 144418
Re: APOD: Laniakea: Our Home Supercluster of... (2014 Sep 10
What is the significance of the red arrow associated with the blue dot which, according to the explanation, represents our location? The red arrow is not mentioned in the explanation. Thanks in advance for any help. Overall, very interesting! Based on the video at the bottom of this page https://pu...