Jump to content
Sign in to follow this  

Coming soon: direct observation of the expansion of the universe

Recommended Posts

Apparently in a decade or so, we should have telescopes good enough that they will be able to measure the expansion of the universe by watching the changing red-shift of distant galaxies. This might even happen in my lifetime! 



Even with today's most powerful telescopes, we can only measure redshifts to a resolution of about 100-to-200 cm/s, which means we'd have to wait centuries to even begin to measure changes in how we view these distant objects.

The ELT(*) should be sensitive to changes in redshift that correspond to additional shifts of just 10 cm/s in overall magnitude.

This represents an improvement of a factor of 10-to-20 over existing telescopes, and means that if we wait just a decade (or perhaps a decade-and-a-half) once the ELT comes online at full power, we should be able to measure the expansion of the Universe directly.

(*) Extremely Large Telescope - zero points for imagination

Share this post

Link to post
Share on other sites

It's exciting, but I think the previous OWL would have been much better. Just imagine the images from a 100 meter mirror!

Still, I can't wait for it to be built, the images should be amazing. 


Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.