Starship Asterisk*

That is one slick and well-framed capture! Kudos to Gijs de Reijke. So, here's my question: where do you find these real-time alerts to astronomical events? I do practically nothing with telescopes (as yet,) but it would be sweet to be notified of something like this that might be visible in my are...

That is one slick and well-framed capture! Kudos to Gijs de Reijke. So, here's my question: where do you find these real-time alerts to astronomical events? I do practically nothing with telescopes (as yet,) but it would be sweet to be notified of something like this that might be visible in my area.

It works just like with stars, except instead of measuring the Doppler shift of absorption lines, you measure the shift of emission lines. Got it. I'm going to assume, then, that the emission spectra are distinct and separate enough that there's little chance of crossover or mistake. I appreciate y...

All right, a complicated question here. The description says that the nebula's own velocity is different from that of the open star cluster. I know that the stars can be measured in redshift because the absorption line patterns define their type, and the shift in where those lines 'should be' tells ...

I've been looking everywhere for this information and can't find it. Can anyone shed some light on how distant the LRG (the 'lens' itself) is?