Can't do this with an Optical Telescope :)

[Alex_Fla]

Please consider joining SARA  Society of Amateur Radio Astronomers

Regards,

Alex

 

[Alex_Fla]

Perhaps the title should read " Can't See This with Your Amateur Optical Telescope "

Even a small Radio Telescope can easily detect the Doppler Shift of interstellar neutral hydrogen gas clouds within the Milky Way.

The differing velocities of the Milky Way's Galactic Arms can be resolved and displayed .

 

This is an example of a single ( 5 minute ) scan .. The contour plot was the result of 8 hours of data collection.

Edited August 21, 2023 by Alex_Fla

[Xilman]

On 17/08/2023 at 11:22, Alex_Fla said:

Perhaps the title should read " Can't See This with Your Amateur Optical Telescope "

Even a small Radio Telescope can easily detect the Doppler Shift of interstellar neutral hydrogen gas clouds within the Milky Way.

The differing velocities of the Milky Way's Galactic Arms can be resolved and displayed .

 

This is an example of a single ( 5 minute ) scan .. The contour plot was the result of 8 hours of data collection.

Now there's a challenge.

It should be possible to amateur spectroscopists to measure radial velocities of bright stars in different spiral arms. A hundred or few carefully selected stars should be sufficient.

Accepted: it is much easier for radio astronomers.