Astronomy / Space Lots of work for the Galaxy Devision of Frontier - Details-on-16-billion-Stars

Jaiotu

Jaiotu
The article definitely should have said "galaxy" not "universe". According to the mission's website they estimate the stellar population of the Milky Way to be >100 billion. Nobody knows the exact number of stars in our galaxy. If you ask Google it says there are 250 billion +/- 150 Billion which gives an estimated range of 100 billion to 400 billion. Gaia chooses to err by going with the low-end figure while Elite: Dangerous chooses to err on the side of the high end one.
 

Patrick_68000

Patrick_68000
Jaiotu said:
The article definitely should have said "galaxy" not "universe". According to the mission's website they estimate the stellar population of the Milky Way to be >100 billion. Nobody knows the exact number of stars in our galaxy. If you ask Google it says there are 250 billion +/- 150 Billion which gives an estimated range of 100 billion to 400 billion. Gaia chooses to err by going with the low-end figure while Elite: Dangerous chooses to err on the side of the high end one.
Click to expand...

Para Handy said:
As Jaiotu says, nobody knows - the estimates generally range from 200 to 400 billion - 100 billion is a very low estimate.
Click to expand...

Perhaps there is much more than 400 billion ?

:)
 

Para Handy

Para Handy
Patrick_68000 said:
Perhaps there is much more than 400 billion ?

:)
Click to expand...

The speculations depend upon the assumed / calculated / modelled mass of the galaxy. 400 billion is based upon the upper estimate of the mass of the Milky Way - this of course is estimated / calculated / modelled (basically) using the speed of stars as they orbit the centre of the galaxy. Figures for this for our galaxy are hampered by the fact that our view is from within the structure so much is hidden from view. Recently the VLBA produced results which covered the very far side of our galaxy so no doubt work is at hand although slight complications might arise from the apparent revelation that the Andromeda galaxy is not actually that much bigger than our own rather than the more than double our size as had been thought.

https://astronomynow.com/2017/10/12/vlba-measurement-promises-complete-picture-of-the-milky-way/

https://astronomynow.com/2018/02/15/milky-way-no-longer-little-brother-to-andromeda-researchers-say/

[where is it]
 

Patrick_68000

Patrick_68000
Para Handy said:
The speculations depend upon the assumed / calculated / modelled mass of the galaxy. 400 billion is based upon the upper estimate of the mass of the Milky Way - this of course is estimated / calculated / modelled (basically) using the speed of stars as they orbit the centre of the galaxy. Figures for this for our galaxy are hampered by the fact that our view is from within the structure so much is hidden from view. Recently the VLBA produced results which covered the very far side of our galaxy so no doubt work is at hand although slight complications might arise from the apparent revelation that the Andromeda galaxy is not actually that much bigger than our own rather than the more than double our size as had been thought.

https://astronomynow.com/2017/10/12/vlba-measurement-promises-complete-picture-of-the-milky-way/

https://astronomynow.com/2018/02/15/milky-way-no-longer-little-brother-to-andromeda-researchers-say/

[where is it]
Click to expand...

Thanks for the links

:)
 
You must log in or register to reply here.
Back
Top Bottom