A. Elliptical galaxies have almost no gas or dust between the stars.
B. Elliptical galaxies vary more in shape than spiral galaxies.
C. Spiral galaxies have almost no gas or dust between the stars.
D. Spiral galaxies contain only old stars.
A
Which of the following is a major difference between elliptical galaxies and spiral galaxies?
The fate of the galaxy – Supermassive Black Holes – BBC science
A scientist maps out the future for our galaxy and the Andromeda galaxy. What will happen when the two galaxies collide in 2 billion years? Check out this video from BBC science show ‘Super Massive Black Holes’ to find out more.
Duration : 0:3:45
Monty python – universe song
A little song about the universe and how insignifcant we are, and livers. from the film ‘The meaning of life’.
Duration : 0:2:44
HUBBLECAST – Gargantuan Galaxy NGC 1132 – a cosmic fossil?
Gargantuan galaxy NGC 1132 – a cosmic fossil?
The NASA/ESA Hubble Space Telescope has captured a new image of the galaxy NGC 1132 which is, most likely, a cosmic fossil — the aftermath of an enormous multi-galactic pile-up, where the carnage of collision after collision has built up a brilliant but fuzzy giant elliptical galaxy far outshining typical galaxies. The elliptical galaxy NGC 1132, seen in this latest image from Hubble, belongs to a category of galaxies called giant ellipticals. NGC 1132, together with the small dwarf galaxies surrounding it, are dubbed a “fossil group” as they are most likely the remains of a group of galaxies that merged together in the recent past.
In visible light NGC 1132 appears as a single, isolated, giant elliptical galaxy, but this is only the tip of the iceberg. Scientists have found that NGC 1132 resides in an enormous halo of dark matter, comparable to the amount of dark matter usually found in an entire group of tens or hundreds of galaxies. It also has a strong X-ray glow from an abundant amount of hot gas — an amount normally only found in galaxy groups. Its X-ray glow extends over a region of space ten times larger than the 120,000 light-year radius it has in visible light. An X-ray glow that is equal in size to that of an entire group of galaxies.
NGC 1132 is located approximately 320 million light-years away in the constellation of Eridanus, the River. This image of NGC 1132 was taken with Hubble’s Advanced Camera for Surveys. Data obtained in 2005 and 2006 through green and near-infrared filters were used to produce a color composite.
Duration : 0:5:54
Astronomers “spot” unseen galaxies
Planet Earth sits in the middle of the vast emptiness of space, according to the human eye.
But a new discovery by European astronomers has confirmed that it is not so empty after all.
Scientists at the University of Geneva’s observatory say they have invented a special camera that can spot galaxies born up to 10 billion years ago.
They say that previous searches for galaxies had missed up to 90 per cent of them.
Al Jazeera spoke to Dr Francisco Diego, an astronomer from the University of London’s observatory, about the new discoveries and how they could possibly revolutionise our understanding of the universe.
[March 24, 2010]
Duration : 0:4:50
Merging Spiral Galaxies – simulating visual appearance
This video shows a computer simulation of the appearance of two merging spiral galaxies as they would appear through a telescope, including absorption of starlight by interstellar dust. The colors are approximately what would be perceived by the human eye. Credits: Patrik Jonsson, Greg Novak & Joel Primack, University of California, Santa Cruz.
This movie won a semifinalist honor (top ten in the category) in the 2008 NSF Science & Engineering Visualization Challenge. A high-quality version can be downloaded from http://www.ucolick.org/~patrik/sunrise/coolstuff.html
The song is “All’s Well that Ends Well” by Nancy Abrams. You can find her web site at http://expandinguniverse.org/.
Duration : 0:4:39
Q and BA Episode 1: Galaxies
I describe galaxies: what they are, what kinds there are, and how we know the Milky Way is a spiral galaxy.
Duration : 0:5:32
Behind the Scenes: When Galaxies Collide (Felicia Day, Sean Astin)
Felicia Day explains some of the science behind galactic “collisions,” including the upcoming collision between the galaxy Andromeda and our own galaxy, in this mock behind-the-scenes look at the making of a NASA educational video. Starring Felicia Day (”The Guild,” “Do You Wanna Date My Avatar”) and Sean Astin (”Lord of the Rings” Trilogy, “Special Agent Oso”).
To view more comedic (but educational!) NASA videos featuring Sean Astin, Mark Hamill, Linda Hamilton, Dean Stockwell, George Takei, Ed Wasser, Betty White and more, visit:
http://coolcosmos.ipac.caltech.edu/videos/irrelevant
NASA’s Spitzer Space Telescope
Duration : 0:10:0
laura veirs galaxies
a small video adaptation of laura veirs phantastic song. maybe every apple is a galaxy in its own. who knows…
Duration : 0:3:30
Super Mario Galaxy : Honeyhive Galaxy – Big Bad Bugaboom
Please read the description before commenting.
If you don’t like the commentary, just mute the video or watch something else.
This is my first FULL playthrough of the game.
Intro made by YouTube member dembonez19.
***
In this mission, Mario will take on the leader of the Mandibugs, Bugaboom.
Once Mario lands on the starting planet, you’ll notice that the presence of Mandibugs has increased. After going through the cave behind the waterfall, the Queen Bee asks Mario for his help. He’ll then confront Bugaboom afterward.
BOSS: Bugaboom
Fighting Bugaboom is like fighting a more powerful Mandibug; his weak spot is his back, so Mario has to ground pound it. The only this is that Bugaboom can fly around, and rather fast too, so it will require some effort to strike him. Bugaboom can also drop bombs. But really, it’s not too hard to beat him.
After Bugaboom is beaten, Mario gains another Power Star. In the next video, we’ll head to both of the two smaller galaxies.
Duration : 0:9:0