I’ll start with a couple I’ve found for keeping up with atomic clock time, but this question isn’t limited to timekeeping, it can also relate to celestial events, weather, etc…
I do like the sleek and streamlined time.ms site, but according to their whois data, they only started that site a couple months ago, while time.gov has been around since 1999.
Long standing sites are preferable, but either way, what other live data sites do you people recommend?
If you accept data that’s updated in realtime but not being actively sampled in realtime, this satellite tracker?
It depends what you mean by real time, but GOES is pretty sick:
https://www.star.nesdis.noaa.gov/GOES/sector.php?sat=G18§or=psw&refresh=true
Updates every five minutes.
Then of course MODIS, VIIRS, Landsat, others. Those don’t have the nice viewer though like this, and yeah, there is some processing, but if you grab through GEE you can get some “preprocessed” results.
Edit (I think this will work?):
This image should stay updated to the “live” view of the western GOES satellite:
