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UCLA Galactic Center Group
เข้าร่วมเมื่อ 1 พ.ค. 2015
What is Adaptive Optics?
Learn why astronomers use the technology called adaptive optics.
มุมมอง: 13 264
วีดีโอ
What is a Black Hole?
มุมมอง 4214 ปีที่แล้ว
There's a supermassive black hole in the center of our galaxy called Sagittarius A*. But what does that mean? What is a black hole?
Where is the center of the galaxy?
มุมมอง 4.8K4 ปีที่แล้ว
Learn how to find the center of the Milky Way Galaxy in the night sky!
How do we find something we cannot see?
มุมมอง 1924 ปีที่แล้ว
How do we know that there is a supermassive black hole at the center of our galaxy? This video explains how the UCLA Galactic Center Group uses the motions of stars and gravity to find the black hole.
What is the Milky Way?
มุมมอง 1794 ปีที่แล้ว
Take a short trip through the Milky Way to learn about it's shape and some of the fascinating areas we can find in our Galaxy.
How Can We See Through the Galaxy to Observe Stars at the Galactic Center?
มุมมอง 4204 ปีที่แล้ว
There is a lot of stuff between us and the Galactic Center. So, how are we able to see the Galactic Center at all?
Animation of the Stellar Orbits around the Galactic Center (2019)
มุมมอง 12K4 ปีที่แล้ว
The UCLA Galactic Center Group has been tracking specific stars orbiting the proposed black hole at the center of our Galaxy for 25 years using 2.2 micron images taken at Keck Telescopes on Mauna Kea in Hawaii. These stellar orbits, and a simple application of Kepler’s Laws of motion, provide the best evidence yet for a supermassive black hole, which has a mass 4 million times the mass of the S...
G objects and stars orbiting the super-massive black hole at the center of our Galaxy
มุมมอง 76K5 ปีที่แล้ว
The center of our Galaxy hosts a supermassive black hole of 4 million times the mass of the Sun. A great number of stars spin around it at very high speed. The UCLA Galactic Center Group discovered another class of objects orbiting the black hole: the G objects. These peculiar objects look like gas clouds but behave like stars. G objects are likely stars that are hidden in a thick envelope of g...
Most-asked questions about the flashes from our galaxy's supermassive black hole!
มุมมอง 1.2K5 ปีที่แล้ว
The UCLA Galactic Center Group members talk about the observation of Sgr A* as it became extremely bright in May 2019. See quantumpenguin/status/1160368687590727680 www.galacticcenter.astro.ucla.edu/
Stellar Orbits around the Galactic Center
มุมมอง 47K5 ปีที่แล้ว
The UCLA Galactic Center Group has been tracking specific stars orbiting the proposed black hole at the center of our Galaxy for more than 20 years Keck Telescopes on Mauna Kea in Hawaii. These stellar orbits, and a simple application of Kepler’s Laws of motion, provide the best evidence yet for a supermassive black hole, which has a mass 4 million times the mass of the Sun. Particularly import...
First Direct Test of Einstein's Theory of General Relativity Near a Supermassive Black Hole
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First Direct Test of Einstein's Theory of General Relativity Near a Supermassive Black Hole
First Direct Test of Einstein's Theory of General Relativity Near a Supermassive Black Hole
มุมมอง 4126 ปีที่แล้ว
We have begun the third and final phase (July-Sep) of the first direct test of Einstein's Theory of General Relativity near a Supermassive Black Hole.
Tracking stars around the supermassive black hole at the center of the Milky Way: now and the future
มุมมอง 13K9 ปีที่แล้ว
Tracking stars around the supermassive black hole at the center of the Milky Way: now and the future
Imagine if we were much closer to the galactic core, and could see this with our backyard telescopes. We'd probably have a different view of the things.
Super informative video, that gets to the point fast! I like it!
Thank you about the helpful information
My question is is this in real time or not.
This movie is based on real observation data.
Was this video recorded in the 70s
No one cares if you came from reddit, let’s just watch the stars.
Very well explained. I want one. 😎 Thank you.
There are apps that works with your gps and you can find what you wanna see in it
Rdfgggn h
Excellent explanation of adaptive optics. Thank you very much.
Did they use the Hubble space telescope to get Sagittarius a what did you want to get like the canned or galaxy?
Very good brief🤩
that light is probably a billion years old by the time it reaches our planet
Actually Sag A is just around 22k light years away from us so the light we are seeing is just 22k years old.
Now we know for sure that the star(Sag2) shown here is orbiting SagA Star/black hole.
All the cool kids are doing this now. More please! With explanations. Sherrie and I are thinking you meant the one with yellow orbit to be the sun/our solar system. Is that what you meant?
Enhance! Enhance!
stars moving that fast...
Awesome stuff! 👍
This won the Nobel prize in physics. Waiting for random guy to ask to explain all of it in a TH-cam comment
Explain it.
@@tbraghavendran ok my explanation is that it's a black hole and it's just at the centre of the galaxy killing the vibe. The stars around it reckon it's a huge drag, like it just really really sucks.
Thank you so much for this video, learned again, now i understand the purpose of the laser. 👍
Tetris Laser sind natürlich keine adaptive Optik. Sondern mediale Verstümmelungen. Wenigstens sind bei einem normalen Teleskop mit einer richtig angewendeten adaptiven Optik überdeckende Informations- Fehler und Streulichtfehler und Bildverschiebungen durch Atmosphärenbewegungen später wieder teils ausgleichbar und gesondert rausfilterbar. Ein Na- Laser erzeugt in bestimmten resonanten doppelten Atmosphärenschichten ein Streulicht wie ein Null - Koordinatensystem bei diffuser gekappter Streu - Polarisation . Man verwendet einen Einzellaser z.m mit der Teleskoprichtung oder für Atmosphärenströmungs messungen mehrere parallele Laser in Reihe. Irgend was stimmt an vielen google Abbildungen nicht. dieser Streulichtbereich (zwischen der angepeilten Störschicht) verursacht weiter entfernt hiervon wieder unterscheidbare polare vektorielle Lichtwellen die zur Erde gelangen (das macht die Atmosphäre) Spektren die sonst nicht normal vorkommen (Natrium-Dampflampenquelle des Lasers ) verwendet man besonders genau zur Messung . Diese polaren Richtungswellen werden auf der Erde geortet. Bei Verschiebung von Atmosphärenschichten verursachen diese im polaren Bereich eine Phasenverschiebung der die Bewegung der verschobenen Atwosphärenschicht genau wiedergibt so wie ein Geschwindigkeitsmesgerät und lokale Geschwindigkeiten der Atmosphären - Schichten wiedergibt. Eine "isolierte Polarisationslinse" an der Endoptik aber noch physikalisch ganzheitlich eingebunden erlaubt es durch Veränderung dieser Polarisationslinse die bds phasengerecht angekoppelt wird die verschobenen isochromatisch hochwertigen Bildanteile an dieser Filterlinse die noch durchkommen , wenn auch verchoben wieder an den "Richtigen räumlichen Ort" bei gleicher Brennpunktschärfe (überall gleich bei diffusem Streulicht, aber verschoben) zurückzuverschieben. Jetzt ist aber auch das überdeckende Streulichtanteil von unserer eigenen Sonne verursachend oder Bodenlichtverchmutzung Informationsüberdeckend da. Dieses wird zum Glück noch teilweise anhand einer ausgemessenen und gekappten Phasendifferenz zum monochromatischem Sichtbild auch schrittweise herausgefiltert. th-cam.com/video/Irwlr2AxbR8/w-d-xo.html th-cam.com/video/B0uLQOaQ79A/w-d-xo.html hierzu etwas merkwürdige Bilder von Tetris Lasern und unredundanten Abbildungen und anderem irr mit krank machendem Fake Vorsicht hiervon :www.faz.net/aktuell/wissen/physik-mehr/vierfach-laser-erzeugt-kuenstliche-sterne-14208371.html Es werden keine künstlichen Sterne . Sondern ein Streulicht, Nullpunkt jeweils zwischen zwei störenden Atmosphärenschichtenseiten erzeugt. Hiervon gibt es viele. Diese werden mit einem Laser jeweils gesucht wenn sie im Bild liegen und gemessen. Viele polare Richtungs - Sensoren auf der Erde vermessen aber die Bildverschiebung räumlich in 3 D und korrigieren diese Bildverschiebungen und Verzerrungen. Ein starrsinniger Tetris - Laser würde möglicherweise die Messapparatur zerstören. Natürlich werden einzelne Lichtantiele aufgespittet analysiert und dann wieder richtig zusammengesetzt Natürlich nicht die Kachel des JW. Die ist so langsam wie ein Elephant. Für den Spiegel braucht man zusätzlich in der Verspiegelung eine Temperatur Druck und Zug ausgleichende Spezialbeschichtung wie bei thermisch stabilen Federn und selbstausgleichnden Unruhen einer Uhr . Die Kacheln darunter dienen nur der groben Erstjustierung ! Oft bei kleinen Konstruktionsfehlern ! auch nachträglich. Die Parabolform muß schon vorher hochgenau bestehen. Sonst kommen Zeichentrickbilder heraus . Hier wirkt die Adaption an die Atmosphäre eher nicht , da zu langsam, viel zu langsam und nochmals zu langsam. immer einen Schritt zurück nur hier kein Schneckenpost .
Was für eine fantastische Arbeit. Danke!
This is the most incredible Time lapse I ever seen, why I don't saw this 3 years before?, Breathtaking
Looks very real hahahahaahhahahaahahahahahah
Profound
I'm here from Dr. Becky's recent video about the imaging of Sag A* and how she mentioned the Keck telescope has already tracked some fascinating interactions between the supermassive black hole at the centre of our galaxy, and the stars that are close to it. She wasn't wrong!
We have a solar system around a Sun that formed, settled, distilled into a set of marbles that rotate around it IN JUST ONE PLANE (with the exception of Pluto). Another reason to kick it out of the solar system club as a johhny come lately. The Sun is not a Black Hole grabbing everything. The Sun has to be happy with just what it has. Yes, there are asteroids & comets. Send a pdf of your Astrophysics Degree.
Well that's brilliant! Thank you!
crux constalletion too
Staggering motion photography
Fascinating!!
It's crazy we figured how to counter the atmospheric changes. The smart humans are leagues beyond the average humans.
something is not right with this video clip,,,the appatent orbit distance is less than the light signature,,the other stars in the field are flying around like bugs around a lamp,,,there is something very wrong here
Pedal to metal. Fiuuuuu fiuuuuu
It's called "black hole"
Hahahahahaha
🤡
Imagine being such a smooth brain that you "think something is wrong here" when trying to conceive astrophysics, but you can't even pass an elementary school art class.
Fantastic
Simply put its in between Scorpio & the southern cross draw a line between the two & boom there’s the centre
Windows 7 Intro: th-cam.com/video/TDiep0WxQ5w/w-d-xo.html
AG SIR Shared this, idk what it is but its beautiful.
Lol Same
Kuch samjah nhi aaya lekin dekh ke achha laga😅
It's the collection of stars rotating around the supermassive black hole at the centre of our galaxy. S0-2 has the closest orbit to the black hole
Thank you for sharing. Really enjoyed your explanations.
So amazing to look that far into the past and be able to watch it move and interpret to the mass via youtube
Thanks - your video was the only one I could find that answered that basic question - which was what I was looking for
Thank you Rebecca, really interesting!
Some weeks back, the California and Oregon wildfires were sending smoke through the jetsream to the skies over my backyard near NYC. According to a few news releases, the smoke was flying over at an altitude of 20,000 to 30,000 feet. Even in narrowband such as Ha, the smoke was messing up my long exposures. However, I got clean images when using a filter that is intended for planetary imaging (Astronomik ProPlanet 742). It has been raining or very cloudy for nearly two weeks. I look forward to am hopeful that conditions will be improved on the next clear night.
Nice overview (+1), but it ended too abruptly ... a very brief into to what the center actually contains (e.g. Sgr A*, et al), and some of the recent studies underway (ex: Ghez/GCG close approach of S02), would have been a more satisfying and informative ending.
Seeing this at a distance of 25 000 light years is mind blowing
Congrats on the Nobel :)
Congrats on Nobel team, by the way, it's not a math simulation but based on recorded observational data. "The orbits are based on the Keck data obtained between 1995 and 2019". Amazing work. It would be interesting to see if the spectrographic output of the stars change based on the gravitational pull of the black hole, I would suspect this gravitational energy would affect the internal workings of the stars, but we probable don't have the resolution.
Is it just the stars themselves or their entire solar systems orbit the black hole?
Just stars. Any planetary system would be immediately disbanded by other stars or black hole because gravitational influences by other stars.
The orbit needs to be modelled in 3D. I predict it "hesitates" when crossing the galactic plane.
Please hurry up and declare Einstein's theory is wrong. You can observe the stars hesitate as they cross the galactic plane.