Beautiful pics of comet #NEOWISE are everywhere this week, taken from the northern hemisphere. Why is this so, and can we see it from Africa? A thread on #CometNeowise
We understand the Universe around us primarily through light, and 16 May, #InternationalDayOfLight is special for those of us who love astronomy. Are you organising an online event around #IDL2020? Share it with us! @IDLofficial
Our understanding of light itself is closely linked with the history of astronomy, be it spectroscopy, wavebands outside the visible, interferometry, or even relativity. And astronomy owes many of its advances to technological innovations around light detectors in every waveband.