Friday, September 21, 2018
Contact us    |    Advertise    |   Help    |   Cookie Policy    |   Privacy Policy    RSS icon Twitter icon Facebook icon
    Home  ·  News  ·  Forum  ·  Stories  ·  Image Gallery  ·  Columns  ·  Encyclopedia  ·  Videos
Find: in

Andromeda is comparable in size to Milky Way


Posted on Friday, 16 February, 2018 | Comment icon 2 comments

Andromeda is moving towards us at 250,000 miles per hour. Image Credit: NASA/JPL-Caltech
It turns out that our closest neighboring galaxy is not the behemoth that scientists had previously thought it to be.
Up until now, the Andromeda galaxy was thought to be much larger than the Milky Way - a fact that could have dire consequences for our own galaxy when the two collide in a few billion years' time.

According to a new study by scientists at the International Center for Radio Astronomy Research however, the two galaxies may actually be approximately the same size.

Calculating the mass of a galaxy is no easy task, especially given that most of it is made up of black holes and dark matter as oppose to visible stars. To find the answer, the ICAR researchers used a new method based on observations of very fast stars made by the William Herschel telescope.

By determining the escape velocity of the galaxy (the speed an object would need to be traveling to escape the galaxy's orbit) and then working backwards, Andromeda's mass could be calculated.

The answer turned out to be between 800 billion and 1.2 trillion solar masses.

Source: Popular Mechanics | Comments (2)

Tags: Andromeda, Galaxy

Recent comments on this story
Comment icon #1 Posted by Sundew on 17 February, 2018, 2:54
Imagine in a few billion years (if the Earth has not been consumed by the Sun, then a red giant) that you could look up into the night and the sky was nearly filled with the Andromeda galaxy. I've always thought it a pity that you can't see a galaxy or two in the night sky,close enough to see them unaided and make our their structure. What a sight it would be.
Comment icon #2 Posted by Not A Rockstar on 17 February, 2018, 6:19
Me, too, Sundew. My idea of a heaven would be to be able to hop around out there and see other planets and space events :). Stand on other worlds and enjoy their sunsets, see their night skies....


Please Login or Register to post a comment.


  On the forums
Mammoths could roam 'Ice Age Park' by 2028
9-21-2018
Scientists in Russia remain optimistic that the woolly mammoth can be resurrected within a decade.
Mars trip radiation exposure levels revealed
9-20-2018
Scientists have calculated the minimum level of radiation that an astronaut will be exposed to on a trip to Mars.
'Croydon cat killer' mystery has been solved
9-20-2018
Police in London have reached the end of their investigation in to the deaths of hundreds of pet cats.
Astronomers discover real-life planet Vulcan
9-20-2018
The new planet is located in the same star system as Spock's home world in the 'Star Trek' universe.
Featured Videos
Gallery icon 
Treadmill fall in slow motion
Posted 9-17-2018 | 2 comments
The Slo Mo Guys return with another bizarre slow-motion experiment.
 
Tricking your ears
Posted 9-9-2018 | 0 comments
A look at some intriguing audio illusions and at how the brain interprets sound.
 
The science of music
Posted 9-5-2018 | 0 comments
A look at why our brains become so hooked on particularly catchy songs.
 
 View: More videos
 
Top   |  Home   |   Forum   |   News   |   Image Gallery   |  Columns   |   Encyclopedia   |   Videos   |   Polls
UM-X 10.712 Unexplained-Mysteries.com 2001-2018
Terms   |   Privacy Policy   |   Cookies   |   Advertise   |   Contact   |   Help/FAQ