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Physics and astronomy thread (3 Viewers)
- Thread starter jamny
- Start date
El Floppo
Footballguy
joffer
Footballguy
http://www.nasa.gov/feature/goddard/astronomers-set-a-new-galaxy-distance-record
An international team of astronomers, led by Yale University and the University of California scientists, pushed back the cosmic frontier of galaxy exploration to a time when the universe was only 5 percent of its present age of 13.8 billion years. The team discovered an exceptionally luminous galaxy more than 13 billion years in the past and determined its exact distance from Earth using the combined data from NASA’s Hubble and Spitzer space telescopes, and the Keck I 10-meter telescope at the W. M. Keck Observatory in Hawaii. These observations confirmed it to be the most distant galaxy currently measured, setting a new record. The galaxy existed so long ago, it appears to be only about 100 million years old.
An international team of astronomers, led by Yale University and the University of California scientists, pushed back the cosmic frontier of galaxy exploration to a time when the universe was only 5 percent of its present age of 13.8 billion years. The team discovered an exceptionally luminous galaxy more than 13 billion years in the past and determined its exact distance from Earth using the combined data from NASA’s Hubble and Spitzer space telescopes, and the Keck I 10-meter telescope at the W. M. Keck Observatory in Hawaii. These observations confirmed it to be the most distant galaxy currently measured, setting a new record. The galaxy existed so long ago, it appears to be only about 100 million years old.
G
General Tso
Guest
Season 6 of Through The Wormwhole is on. Episode 2 was on time as the 4th dimension with all the cutting edge theories about how time works. In one clip a scientist actually claims to have proof of a communication back in time. One of the best episodes and I've seen every one at least three times.
MikeIke
Footballguy
Scientists may have discovered two supermassive black holes orbiting each other in a death spiral. The cool thing is that the computer model suggests they could collide and merge within the next 21 years. If so it would be an incredible opportunity to study such a freak occurrence.
jamny
Footballguy
cstu
Footballguy
Galileo
Footballguy
How the future may influence the past...the wonderfully wacky quantum world... http://secondnexus.com/technology-and-innovation/physicists-demonstrate-how-time-can-seem-to-run-backward-and-the-future-can-affect-the-past/
NCCommish
Footballguy
Galileo
Footballguy
NCCommish
Footballguy
matttyl
Footballguy
Ok, so the galaxy is 10.5 billion light years away but they think they will collide within the next 21 years? Does that mean they may have collided 10.5B-21 years ago, or that they will collide in the next 21 years but we won't be able to see it for another 10.5 billion years? Explain it to me like I'm 10. Then do it again like I'm 5.
El Floppo
Footballguy
TheIronSheik
SUPER ELITE UPPER TIER
El Floppo
Footballguy
TheIronSheik
SUPER ELITE UPPER TIER
GregR
Footballguy
After learning this, I've decided I can wait to start pondering it for a few years.
Mario Kart
Footballguy
Can't wait to see what the James Webb telescope can do. I know it has a shield to keep light away but I wonder what it would take to have a telescope orbit around the moon or if its plausible. Having that dark side with nearly no light penetrating the mirrors, I wonder what that could do.
joffer
Footballguy
the JWST has amazing potential, but putting it out at the earth-sun L2 point is dangerous. Is it even possible to service it out there?
Mario Kart
Footballguy
joffer
Footballguy
shoot for the stars
TheIronSheik
SUPER ELITE UPPER TIER
Yoda?jon_mx said:
RC94
Footballguy
Astronomers spot brightest galaxy in early universe: http://www.cbsnews.com/news/astronomers-spot-brightest-galaxy-in-early-universe/
matttyl
Footballguy
Can someone explain to me how last night I could see both Jupiter (which if farther from the sun than us) as well as Venus (which is closer to the sun than us) at the same time? I mean, it was in the evening, when North America was facing away from the sun, but we could see a planet that is closer to it, and only a few degrees away from a planet much, much farther away?
That kinda blew my mind a little bit.
That kinda blew my mind a little bit.
matttyl
Footballguy
They both were, as they were very close to each other. I guess I just don't understand how these two objects, which are extremely far apart, and where one is much closer to a set point (the sun) and the other is so far away from that same point can seem so close together. Moreover, since Venus is closer to the sun, how/why we're able to see it at night when our "back is to the sun" is kinda odd to me as well.
Anyway, the two are suppose to be extremely close together (from our perspective) over the next few weeks. Give it a look. Apparently they will look closer together in the sky to us than the distance across the moon seems.
GregR
Footballguy
Venus would be close behind us and appear to be off to the side of the sun. Jupiter would be off in the same direction and visible, but would not have yet fully "made the turn" coming out from behind the sun so to speak.
Here, you can see the current planet positions at this page: http://www.theplanetstoday.com/
Edit to add Venus could also be more on the backside of the sun at the same time Jupiter was would be another way.
Last edited by a moderator:
matttyl
Footballguy
Exactly what I needed to see to visualize this. One of the "sliders" on that page allows you to set the orbital distance to it's proper scale. I guess that's what was throwing me off a bit as we're much, much , much closer to Venus than to Jupiter.
TheIronSheik
SUPER ELITE UPPER TIER
July 1st (night of June 30th) Venus and Jupiter will be the closest in the sky they've been in a very long time. I've got the date marked on my calendar to watch.
matttyl
Footballguy
That's what I wasn't able to visualize. "At night", Venus would be "at our back".
joffer
Footballguy
http://www.pbs.org/wgbh/nova/next/physics/in-100-years/
Long, but interesting read about the possible physics discoveries of the next 100 years.
Long, but interesting read about the possible physics discoveries of the next 100 years.
matttyl
Footballguy
No idea if true, but the facebook claim is that this is what may have been thought of as the "star of Bethlehem" ~2000 years ago.
Flying Spaghetti Monster
Footballguy
So if you fall into a black hole it will turn you into a hologram.
http://arstechnica.com/science/2015/06/falling-into-a-black-hole-may-convert-you-into-a-hologram/
http://arstechnica.com/science/2015/06/falling-into-a-black-hole-may-convert-you-into-a-hologram/
TheIronSheik
SUPER ELITE UPPER TIER
I waited all year for it and it rained last night.joffer said:
Galileo
Footballguy
New 5-quark particle discovered at LHC... http://home.web.cern.ch/about/updates/2015/07/discovery-new-class-particles-lhc
RC94
Footballguy
Ingredients for Earth-Like Planets Are Found All Around the Milky Way: http://www.space.com/29898-earthlike-alien-planets-recipe.html
joffer
Footballguy
http://www.fromquarkstoquasars.com/coldest-hottest-temperatures-known-universe-infographic/
Cool temperature graphic
Cool temperature graphic
NCCommish
Footballguy
This is one of the reasons to go back to the moon and establish a permanent settlement. It will make mining the asteroid belt much more feasible.
RC94
Footballguy
I love the Hubble Telescope: http://www.cbsnews.com/pictures/hubble-space-telescope-25-year-anniversary/
G
General Tso
Guest
The LHC is back online, and this time the target is wimps. http://www.wsj.com/articles/physicists-restart-souped-up-hadron-collider-1437948498
NCCommish
Footballguy
So sad we didn't build this. Really has us taking a backseat to Europe. Such a shame shortsighted won the day.
Anyway a 70% increase in energy is pretty impressive. Can't wait to see what they find this time.
G
General Tso
Guest
You said it. It's one of the coolest things on the planet right now. And we are sending all of our greatest minds over there. I'm not sure if it's tourist friendly, but I'd love to see it in person with my son.
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