We have had this tag since 2014:
- gravitational-waves 181 questions
Waves in spacetime formed by the acceleration of massive bodies. A passing wave causes spacetime to be stretched and squashed by a very small amount. Typically we can only detect the most energic gravitational events such as black hole mergers.
About 1.5 years ago a second tag was added with a pretty low usage rate:
- gravitational-wave-astronomy 7 questions
The gravitational-wave-astronomy tag has no usage guidance, can you help us create it?
I think it's unlikely that we'll have questions about gravitational waves that are not related to Astronomy in some way. I don't see how having both tags and having each question author grapple with how to decide if they should use one, the other, or both.
Should they be merged, or some other action taken to consolidate back to a single tag?
Note that when we want to narrow down the aspect of gravitational waves the question addresses, we generally add one or more of the following:
- observational-astronomy 1,297 questions
Questions about the techniques and practice of observing the night sky.
- observatory 71 questions
Questions regarding structures designed to aid in the observation of astronomical objects.
- instruments 53 questions
The instruments tag has no usage guidance, can you help us create it?
- cosmology 518 questions
Questions about the origin, history, evolution and fate of the Universe.
- time-domain-astronomy 23 questions
The time-domain-astronomy tag has no usage guidance, can you help us create it?
- observation-campaign 8 questions
The observation-campaign tag has no usage guidance, can you help us create it?