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Posted: 5/14/2015 7:46:32 PM EDT
[#1]
The gravitational effect of a large quantity of dark matter distorts the light around galaxy cluster Abell 1689
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Posted: 5/14/2015 7:52:46 PM EDT
[#2]
Quote HistoryQuoted:
Think of a neutron star as a gigantic atom. The density of it is the same as the density of the nucleolus of an atom. Quote HistoryQuoted:
Quoted:
our sun compared to blue supergiant http://svs.gsfc.nasa.gov/vis/a010000/a011200/a011250/Sun-Star_Scale_FINAL_1080_Unlabeled.jpg http://svs.gsfc.nasa.gov/vis/a010000/a011200/a011250/Sun-Star_Scale_FINAL_1080_Unlabeled.jpg Neutron Stars scroll all the way down  At these incredibly high densities, you could cram all of humanity into a volume the size of a sugar cube.
http://www.astro.umd.edu/~miller/ns.gif Think of a neutron star as a gigantic atom. The density of it is the same as the density of the nucleolus of an atom. And it may even be denser than that... The theories about what is possible in their codes are pretty awesome... Quark stars, degenerate matter, strange matter.. Matter at its densest.. |
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Posted: 5/14/2015 7:56:13 PM EDT
[#3]
A message from the Carina Nebula!
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Posted: 5/14/2015 8:20:39 PM EDT
[#4]
What you might see if you were to cross the event horizon of a black hole
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Posted: 5/14/2015 10:41:07 PM EDT
[#5]
Quote HistoryQuoted:
I went looking for the large version of that. Figured you could get a print or something. Turns out it's fake. A composite of two separate images.  Quote HistoryQuoted:
I went looking for the large version of that. Figured you could get a print or something. Turns out it's fake. A composite of two separate images. This one is real: 
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Posted: 5/15/2015 2:44:08 AM EDT
[#6]
Quote HistoryQuoted:
Wait, so is something moving faster than the speed of light here? Any further reading material on this? Quote HistoryQuoted:
Quoted:
Everyone knows that the edge of the observable universe is 14 billion light years away give or take a little right? Wrong. The light we see from the edge is that far away. Because the space between here and there has been expanding while the light in transit for 14 billion years the objects we are seeing at the edge are now about 47 billion light years away. http://i743.photobucket.com/albums/xx80/TheChaos0/mind-blown-2.gif Wait, so is something moving faster than the speed of light here? Any further reading material on this? Relativity. Speed of light is relative to the media it's traveling through. It's just the space between us and the light is expanding and when you add up the tremendous distances, it's a whole lot of speed. For more reading, look up general and special relativity. |
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Posted: 5/15/2015 9:54:13 AM EDT
[#7]
Quote HistoryQuoted:
Relativity. Speed of light is relative to the media it's traveling through. It's just the space between us and the light is expanding and when you add up the tremendous distances, it's a whole lot of speed. For more reading, look up general and special relativity. Quote HistoryQuoted:
Quoted:
Quoted:
Everyone knows that the edge of the observable universe is 14 billion light years away give or take a little right? Wrong. The light we see from the edge is that far away. Because the space between here and there has been expanding while the light in transit for 14 billion years the objects we are seeing at the edge are now about 47 billion light years away. http://i743.photobucket.com/albums/xx80/TheChaos0/mind-blown-2.gif Wait, so is something moving faster than the speed of light here? Any further reading material on this? Relativity. Speed of light is relative to the media it's traveling through. It's just the space between us and the light is expanding and when you add up the tremendous distances, it's a whole lot of speed. For more reading, look up general and special relativity. The Destiny will get there someday, and seed those galaxies with stargates. |
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Posted: 5/15/2015 10:07:59 AM EDT
[#8]
Quote HistoryQuoted:
What you might see if you were to cross the event horizon of a black hole  https://www.youtube.com/watch?v=eI9CvipHl_cAlways liked that video. Would be cool to see something like that reproduced with the more accurate visual model of of a black hole we know today |
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Posted: 5/15/2015 11:49:07 AM EDT
[#9]
Quote HistoryQuoted:
My 8 year old daughter just asked me if there is a planet with dragons... I showed her the Andromada image and let her see for herself that by the numbers... There most likely is a dragon planet... She is super excited... Get her C.S.Lewis' trilogy (Out of the Silent Planet; Perelandra; That Hideous Strength) |
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Posted: 5/18/2015 1:07:53 PM EDT
[#10]
Hi there.
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Posted: 5/18/2015 7:53:22 PM EDT
[#11]
Quote HistoryQuoted: They are thought to be something called Graben caused by an impact. http://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Fault-Horst-Graben.svg/534px-Fault-Horst-Graben.svg.png Quote HistoryQuoted: Quoted: Quoted: There is currently a NASA probe exploring the asteroid belt between Mars and Jupiter. This mission has already visited a large asteroid named vesta. http://upload.wikimedia.org/wikipedia/commons/f/ff/Vesta_Rotation.gif Why does that thing have ridge lines going all the way around it? http://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Fault-Horst-Graben.svg/534px-Fault-Horst-Graben.svg.png Why? Because my professor said "If you are having trouble keeping them straight, remember, you can ride a Horst but you can't ride a Graben". |
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Posted: 5/27/2015 6:18:13 PM EDT
[#12]
We'er getting closer:
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Posted: 5/29/2015 5:26:45 PM EDT
[#13]
Apollo 11 from the LRO:
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Posted: 5/29/2015 5:44:45 PM EDT
[#14]
Bill Nye's Light Sail spacecraft has loss touch with earth. Amateurs, they didn't even design an interrupt reset. "Hoping" for a reset due to a random charged particle is not a plan. |
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Posted: 5/31/2015 2:25:21 PM EDT
[#15]
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Posted: 5/31/2015 2:33:45 PM EDT
[#16]
Fe'y
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Posted: 5/31/2015 3:55:35 PM EDT
[#17]
Interesting to note Nye's craft was not the first to use 'solar sailing', that honor goes to MESSENGER.
From my friend on the MESSENGER team: The MESSENGER Mission (go JHU/APL!) was the first spacecraft to operationally use solar sailing. Solar pressure increases to the square of the distance to the sun, so solar sailing made sense for a mission to Mercury. Saved quite a bit of propellant and reduced a bunch or risk. Dan O'Shaugnessy won the Heinlein Award for this. Very nice piece of work and well deserved. Extended abstract. MESSENGER's use of Solar Sailing abstract |
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Posted: 6/1/2015 1:26:49 PM EDT
[#18]
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Posted: 6/1/2015 1:44:19 PM EDT
[#19]
A pretty good image gallery I found: http://www.ipac.caltech.edu/2mass/gallery/
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Posted: 6/1/2015 1:45:48 PM EDT
[#20]
If you look closely at the full res version of this pic you can see the earth and the moon from the curiosity rover.
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Posted: 6/1/2015 1:55:15 PM EDT
[#21]
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Posted: 6/1/2015 1:59:53 PM EDT
[#22]
Gemini mission:  |
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Posted: 6/1/2015 2:07:14 PM EDT
[#23]
Was clear enough last night to see 4 moons and 2 dark bands on Jupiter with a 60x spotting scope... Couldn't get a good pic tho..
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Posted: 6/1/2015 2:16:16 PM EDT
[#24]
Quote HistoryQuoted:
Was clear enough last night to see 4 moons and 2 dark bands on Jupiter with a 60x spotting scope... Couldn't get a good pic tho.. I know! Its about time it stopped raining here in Texas.. |
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Posted: 6/1/2015 3:34:35 PM EDT
[#25]
Quote HistoryQuoted: Was clear enough last night to see 4 moons and 2 dark bands on Jupiter with a 60x spotting scope... Couldn't get a good pic tho.. |
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Posted: 6/2/2015 10:55:45 AM EDT
[#26]
I need to get my scope out
that streak is the ISS making an appearance |
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Posted: 6/2/2015 11:12:51 AM EDT
[#27]
Quote HistoryAttach it to your rear bumper? Would be great for tailgaters. |
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Posted: 6/2/2015 12:13:05 PM EDT
[#28]
Quote HistoryQuoted:
<a href="http://s207.photobucket.com/user/mdar15manager/media/SolarSail_zpsdaxbu5sw.jpg.html" target="_blank">http://i207.photobucket.com/albums/bb277/mdar15manager/SolarSail_zpsdaxbu5sw.jpg</a> Bill Nye's Light Sail spacecraft has loss touch with earth. Amateurs, they didn't even design an interrupt reset. "Hoping" for a reset due to a random charged particle is not a plan. I don't understand why these things wouldn't have an automatic reset/reboot built in so that every, say, 30 days the computer does an uncommanded reset. Have it so that an interrupt signal would have to be received from Earth to keep the restart from happening. Everything cool? Great, just send the restart interrupt signal. Can't get a signal? Auto reset proceeds at scheduled time. |
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Posted: 6/2/2015 2:05:29 PM EDT
[#29]
Quote HistoryQuoted:
I don't understand why these things wouldn't have an automatic reset/reboot built in so that every, say, 30 days the computer does an uncommanded reset. Have it so that an interrupt signal would have to be received from Earth to keep the restart from happening. Everything cool? Great, just send the restart interrupt signal. Can't get a signal? Auto reset proceeds at scheduled time. That's what makes me think it was amateurs that built this bird. On one craft I worked on we had a timer interrupt perform a reset. If the timer was not reset periodically by the OS it was assumed it was stuck in a loop somewhere and the timer would count down and reset the bird. The communications systems also had a type of interrupt only if there was no communications on the high speed band it assumed a problem and would automatically switch over to the low speed band & antenna and try again. These are very basic ideas when building robotic devices that will operate where nobody can walk over and push a button or pull the battery - maybe Bill should go back to TV and leave the engineering to the engineers. |
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Posted: 6/2/2015 5:04:19 PM EDT
[#30]
Quote HistoryQuoted: That's what makes me think it was amateurs that built this bird. On one craft I worked on we had a timer interrupt perform a reset. If the timer was not reset periodically by the OS it was assumed it was stuck in a loop somewhere and the timer would count down and reset the bird. The communications systems also had a type of interrupt only if there was no communications on the high speed band it assumed a problem and would automatically switch over to the low speed band & antenna and try again. These are very basic ideas when building robotic devices that will operate where nobody can walk over and push a button or pull the battery - maybe Bill should go back to TV and leave the engineering to the engineers. Quote HistoryQuoted: Quoted: I don't understand why these things wouldn't have an automatic reset/reboot built in so that every, say, 30 days the computer does an uncommanded reset. Have it so that an interrupt signal would have to be received from Earth to keep the restart from happening. Everything cool? Great, just send the restart interrupt signal. Can't get a signal? Auto reset proceeds at scheduled time. That's what makes me think it was amateurs that built this bird. On one craft I worked on we had a timer interrupt perform a reset. If the timer was not reset periodically by the OS it was assumed it was stuck in a loop somewhere and the timer would count down and reset the bird. The communications systems also had a type of interrupt only if there was no communications on the high speed band it assumed a problem and would automatically switch over to the low speed band & antenna and try again. These are very basic ideas when building robotic devices that will operate where nobody can walk over and push a button or pull the battery - maybe Bill should go back to TV and leave the engineering to the engineers. |
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Posted: 6/2/2015 5:18:40 PM EDT
[#31]
Quote HistoryQuoted:
Apparently a red dwarf star was recently discovered that passed 0.8 lightyears from the sun 70,000 years ago. That is close enough to technically be within our solar system: http://www.universetoday.com/119038/a-star-passed-through-the-solar-system-just-70000-years-ago/ http://i0.wp.com/www.universetoday.com/wp-content/uploads/2015/02/Scholzs-and-the-OortCloud.jpg And the statistical likelihood of that, even over a 500,000 years, are minuscule. ...even when Andromeda collides with the Milky Way, the odds are that our solar system won't be impacted at all (other than having previously been baked by Sol). Loving this thread. |
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Posted: 6/3/2015 1:46:27 PM EDT
[#32]
Two of Saturn's moons, Epithemeus and Janus, trade orbits every four years.
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Posted: 6/3/2015 2:47:48 PM EDT
[#33]
Quote HistoryQuoted:
We'er getting closer: http://pluto.jhuapl.edu/Multimedia/Science-Photos/pics/NH_COMP_V4_sets.003.jpg I was downstairs waiting for one of the shuttle busses. On the displays that let you know when the next bus arrives they added a clock for New Horizons. 
For a web clock and more info go here |
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Posted: 6/3/2015 3:02:32 PM EDT
[#34]
Quote HistoryQuoted:
I was downstairs waiting for one of the shuttle busses. On the displays that let you know when the next bus arrives they added a clock for New Horizons. <a href="http://s207.photobucket.com/user/mdar15manager/media/Misc/countdown_zpseikyxevt.jpg.html" target="_blank">http://i207.photobucket.com/albums/bb277/mdar15manager/Misc/countdown_zpseikyxevt.jpg</a> For a web clock and more info go here Quote HistoryQuoted:
Quoted:
We'er getting closer: http://pluto.jhuapl.edu/Multimedia/Science-Photos/pics/NH_COMP_V4_sets.003.jpg I was downstairs waiting for one of the shuttle busses. On the displays that let you know when the next bus arrives they added a clock for New Horizons. <a href="http://s207.photobucket.com/user/mdar15manager/media/Misc/countdown_zpseikyxevt.jpg.html" target="_blank">http://i207.photobucket.com/albums/bb277/mdar15manager/Misc/countdown_zpseikyxevt.jpg</a> For a web clock and more info go here Any new images or info from NH? |
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Posted: 6/3/2015 3:29:44 PM EDT
[#35]
Quote HistoryQuoted:
Any new images or info from NH? Quote HistoryQuoted:
Quoted:
Quoted:
We'er getting closer: http://pluto.jhuapl.edu/Multimedia/Science-Photos/pics/NH_COMP_V4_sets.003.jpg I was downstairs waiting for one of the shuttle busses. On the displays that let you know when the next bus arrives they added a clock for New Horizons. <a href="http://s207.photobucket.com/user/mdar15manager/media/Misc/countdown_zpseikyxevt.jpg.html" target="_blank">http://i207.photobucket.com/albums/bb277/mdar15manager/Misc/countdown_zpseikyxevt.jpg</a> For a web clock and more info go here Any new images or info from NH? You can find the raw images here from May 30th. But without processing they are not particularly 'spectacular', especially the ones with the long exposure levels. Though I kinda like this one raw image taken at 53.9M KM of Pluto and Charon:  " />
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Posted: 6/3/2015 8:16:42 PM EDT
[#36]
I have a thread on this but I'm cross posting it here because that thread will eventually get buried and I think it belongs here too:
I found these cool vids on the Coriolis effect. If you have two 1080 monitors like me put the vid I linked below on the left. You will see what I mean in a minute. |
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Posted: 6/3/2015 8:35:56 PM EDT
[#37]
Quote HistoryQuoted: Two of Saturn's moons, Epithemeus and Janus, trade orbits every four years. http://www.youtube.com/watch?v=gsHBE3DWCP4MAKE A HOLE!  |
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Posted: 6/4/2015 1:16:45 PM EDT
[#38]
Photos from a comet's surface: http://www.space.com/29541-eerie-comet-landscape-photos.html
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Posted: 6/4/2015 2:42:23 PM EDT
[#39]
Quote HistoryQuote HistoryQuoted:
Quoted:
Two of Saturn's moons, Epithemeus and Janus, trade orbits every four years. http://www.youtube.com/watch?v=gsHBE3DWCP4http://www.greuti.ch/cassini/fb_epimetheus_n00043503-36.gif Any idea what moon comes in from the left at the end of the gif? |
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Posted: 6/4/2015 5:29:30 PM EDT
[#40]
Quote HistoryQuoted: Any idea what moon comes in from the left at the end of the gif? Quote HistoryQuoted: Quoted: Quoted: Two of Saturn's moons, Epithemeus and Janus, trade orbits every four years. http://www.youtube.com/watch?v=gsHBE3DWCP4http://www.greuti.ch/cassini/fb_epimetheus_n00043503-36.gif Any idea what moon comes in from the left at the end of the gif? |
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Posted: 6/5/2015 1:24:05 PM EDT
[#41]
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Posted: 6/5/2015 6:00:57 PM EDT
[#42]
Quote HistoryQuoted:
You can clearly see that the barycenter of pluto and charon is located in empty space: http://i.imgur.com/LgWwoQh.gif Is there a repeating pattern in the orbital change or is it always for lack of a better term "random" due to the interactions? |
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Posted: 6/5/2015 6:15:54 PM EDT
[#43]
Quote HistoryQuoted: Is there a repeating pattern in the orbital change or is it always for lack of a better term "random" due to the interactions? Quote HistoryQuoted: Quoted: You can clearly see that the barycenter of pluto and charon is located in empty space: http://i.imgur.com/LgWwoQh.gif Is there a repeating pattern in the orbital change or is it always for lack of a better term "random" due to the interactions? The weirdness in the other planets orbits is nonrandom and follows a resonance pattern with their gravity wells interacting with each other. If it was random the would eventually smash into each other.  |
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Posted: 6/5/2015 6:28:35 PM EDT
[#44]
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Posted: 6/5/2015 6:47:08 PM EDT
[#45]
There is a also resonance pattern between neptune and pluto which keeps pluto's orbit stable and prevents a collision between the two. interestingly the resonance pattern actually means that pluto comes closer to Uranus than it ever comes to the outer planet Neptune.
Jupiter: Purple Saturn: Yellow Uranus: Green Neptune: Blue Pluto: Purple.
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Posted: 6/5/2015 7:09:31 PM EDT
[#46]
Quote HistoryQuoted:
I'm not sure I follow what you are asking. Do you see something I don't see in the gif or are you referring to the recent news that Pluto's other moons have odd spin characteristics? The weirdness in the other planets orbits is nonrandom and follows a resonance pattern with their gravity wells interacting with each other. If it was random the would eventually smash into each other. http://i.imgur.com/cH2l37N.gif Quote HistoryQuoted:
Quoted:
Quoted:
You can clearly see that the barycenter of pluto and charon is located in empty space: http://i.imgur.com/LgWwoQh.gif Is there a repeating pattern in the orbital change or is it always for lack of a better term "random" due to the interactions? The weirdness in the other planets orbits is nonrandom and follows a resonance pattern with their gravity wells interacting with each other. If it was random the would eventually smash into each other. http://i.imgur.com/cH2l37N.gif Just watching the gif I looks like if if you drew a line following the orbit of Pluto it would not repeat the pattern ... On each orbit around it's berycenter the interactions with the moon are different every time... Or it's just a product of a short gif and too much sun... |
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Posted: 6/5/2015 7:20:00 PM EDT
[#47]
Quote HistoryQuoted: Just watching the gif I looks like if if you drew a line following the orbit of Pluto it would not repeat the pattern ... On each orbit around it's berycenter the interactions with the moon are different every time... Or it's just a product of a short gif and too much sun... Quote HistoryQuoted: Just watching the gif I looks like if if you drew a line following the orbit of Pluto it would not repeat the pattern ... On each orbit around it's berycenter the interactions with the moon are different every time... Or it's just a product of a short gif and too much sun... |
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Posted: 6/5/2015 9:42:58 PM EDT
[#48]
Quote HistoryQuoted: There is a also resonance pattern between neptune and pluto which keeps pluto's orbit stable and prevents a collision between the two. interestingly the resonance pattern actually means that pluto comes closer to Uranus than it ever comes to the outer planet Neptune. Jupiter: Purple Saturn: Yellow Uranus: Green Neptune: Blue Pluto: Purple. |
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Posted: 6/5/2015 9:53:12 PM EDT
[#49]
Quote HistoryQuoted: So the reference frame is rotating so Neptune doesn't appear to orbit? Quote HistoryQuoted: Quoted: There is a also resonance pattern between neptune and pluto which keeps pluto's orbit stable and prevents a collision between the two. interestingly the resonance pattern actually means that pluto comes closer to Uranus than it ever comes to the outer planet Neptune. Jupiter: Purple Saturn: Yellow Uranus: Green Neptune: Blue Pluto: Purple. http://www.orbitsimulator.com/gravity/pluto2.GIF So the reference frame is rotating so Neptune doesn't appear to orbit? |
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Posted: 6/7/2015 11:52:32 AM EDT
[#50]
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