Search found 16 matches

by alphachap
Fri Nov 25, 2011 7:27 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The View from Chajnantor (2011 Nov 23)
Replies: 26
Views: 5407

Re: APOD: The View from Chajnantor (2011 Nov 23)

Hey! A pre-StarTrek Wesley in a black shirt -standing by- the singer. Last i saw of him, i think he was about to find out how to travel without a space-ship, like the "Traveler" from Tau-Alpha (something) does. http://upload.wikimedia.org/wikipedia/en/e/e6/WesleyCrusher2366.jpg <<Richard ...
by alphachap
Tue Nov 22, 2011 2:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Colorful Side of the Moon (2011 Nov 18)
Replies: 28
Views: 3222

Re: APOD: A Colorful Side of the Moon (2011 Nov 18)

Any similar image of the near side of the moon?
by alphachap
Mon Nov 14, 2011 1:53 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Waterfall, Moonbow, and Aurora from... (2011 Nov 14)
Replies: 46
Views: 9352

Aurora borealis in Australia ?

Rainbow has come to have meanings other than simply a ... well, the literal rainbow. It's not entirely incorrect to call a waterfall rainbow a rainbow but if you want to argue it here I guess I won't stop you. I'm just saying most people will probably go on calling the phenomenon a rainbow and not ...
by alphachap
Wed Oct 19, 2011 1:01 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Movie: Approaching Light Speed (2011 Oct 18)
Replies: 43
Views: 7024

Re: Slow speed distortion?

I am puzzled. The first visual effect I see on acceleration is that the building in the distance appears to move farther away -- but this occurs at v<<c, well before any relativistic effects will be noticible. As it happens, I have a lot of experience with motion at subrelativistic speeds :) and wh...
by alphachap
Tue Oct 18, 2011 11:20 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Movie: Approaching Light Speed (2011 Oct 18)
Replies: 43
Views: 7024

Re: APOD: Movie: Approaching Light Speed (2011 Oct 18)

"The consequences of this fiction have been restricted to optical effects".
What do they mean by that? What other effect would there be?
by alphachap
Sat Oct 15, 2011 10:36 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 4565: Galaxy on Edge (2011 Oct 15)
Replies: 13
Views: 3004

Re: APOD: NGC 4565: Galaxy on Edge (2011 Oct 15)

Here's a close up from ESO VLT: (why image so small? the source I uploaded was much larger) http://www.eso.org/public/images/eso0525a/

Also, it would be nice to get a view from the other side, for a change.
by alphachap
Wed Oct 12, 2011 3:29 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Saturn: Shadows of a Seasonal Sundial (2011 Oct 12)
Replies: 15
Views: 3550

Re: APOD: Saturn: Shadows of a Seasonal Sundial (2011 Oct 12

orin stepanek wrote:I really never thought of the rings being like a sundial; but that does make sense! :mrgreen:
Is it a sundial if it doesn't tell the time of day?
by alphachap
Wed Oct 12, 2011 3:26 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Saturn: Shadows of a Seasonal Sundial (2011 Oct 12)
Replies: 15
Views: 3550

Re: APOD: Saturn: Shadows of a Seasonal Sundial (2011 Oct 12

mactavish wrote:The many images of Saturn relayed to us by Cassini are absolutely fascinating. If only Galileo could have seen them. We are soooooo fortunate!
Too far to see from Jupiter's orbit, also the broken high-gain antenna (caused by relying on the shuttle as a launcher) didn't help.
by alphachap
Mon Oct 03, 2011 6:15 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Dark Matter Movie from the Bolshoi... (2011 Oct 03)
Replies: 26
Views: 5089

Re: Where are we?

Where are we in this simulation? It looks like there's a huge clump of dark matter in the middle, with various other accretions throughout. Can we see the Milky Way? The local group? The Virgo Supercluster? It would be nice to have a little arrow stating "you are here." We are nowhere in ...
by alphachap
Mon Oct 03, 2011 1:31 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Dark Matter Movie from the Bolshoi... (2011 Oct 03)
Replies: 26
Views: 5089

Re: APOD: Dark Matter Movie from the Bolshoi... (2011 Oct 03

I suspect we can not see this dark matter because it is in a parallel universe. This parallel universe may be very close to our, millimeters or picometers, but along a fourth space dimension. If gravity can span this fourth dimension, then we would gravitationally feel this matter but not see it. Th...
by alphachap
Thu Apr 14, 2011 10:52 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Centaurus Radio Jets Rising (2011 Apr 13)
Replies: 21
Views: 4550

Re: APOD: Centaurus Radio Jets Rising (2011 Apr 13)

astrotrigg wrote:Anyone notice that the background sky in the image is a fake? There are multiple repetitions throughout.... ???? Was it a simulated night sky?
Yo, you're right!
by alphachap
Wed Apr 13, 2011 10:38 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Centaurus Radio Jets Rising (2011 Apr 13)
Replies: 21
Views: 4550

Re: APOD: Centaurus Radio Jets Rising (2011 Apr 13)

Good morning! I believe to know we have a black hole in our galaxy too. Does such an image exist for our black hole as well? How would it look like "from the inside"? Are we not inside a black hole? Nothing can escape our universe, not even light. The more massive a black hole, the less d...