Astronomer at ASTRON in the Netherlands, working with the LOFAR low frequency radio telescope. https://bsky.app/profile/cbassa.bsky.socialhttps://bsky.app/profile/cbassa.bsky.social/post/3mcsot6jiws2uAn absolutely awesome display of Northern Lights over the Netherlands during the past hour! Red glow in the North and a green curtain passing over whose motion was very obvious with the naked eye. This is 1 hour worth of 15 second exposures with my all sky camera from 21to 22UTC. #auroraBorealis19 Jan 2026 22:27 +0000at://did:plc:fccwt3dv7s4tg4nc52phy2ir/app.bsky.feed.post/3mcsot6jiws2uhttps://bsky.app/profile/cbassa.bsky.social/post/3mc5yggoxas24Picking up the old hobby of catching radio signals from newly launched satellites. These are 5 satellites from the Space X launch that happened less than 3 hours ago. Signals from 4 CONNECTA IOT satellites on 401.5MHz and 2240MHz, as well as CarbSAR at 2243.333MHz.11 Jan 2026 16:53 +0000at://did:plc:fccwt3dv7s4tg4nc52phy2ir/app.bsky.feed.post/3mc5yggoxas24https://bsky.app/profile/cbassa.bsky.social/post/3mbr23bnj4s2kSince posting this 2025 year-long keogram, there have been quite a few questions asking how it was created and what is visible. In this thread I'll try to explain how it all works.06 Jan 2026 13:18 +0000at://did:plc:fccwt3dv7s4tg4nc52phy2ir/app.bsky.feed.post/3mbr23bnj4s2khttps://bsky.app/profile/cbassa.bsky.social/post/3mbfb7g3h222cHappy new year! My all sky camera imaged the sky every 15 seconds and this picture shows what happened in the sky in 2025. It shows the length of the night and day with the hourglass shape, the monthly lunar cycle with the diagonal bands, the elevation of the Sun at local noon, and lots of clouds.01 Jan 2026 20:53 +0000at://did:plc:fccwt3dv7s4tg4nc52phy2ir/app.bsky.feed.post/3mbfb7g3h222chttps://bsky.app/profile/cbassa.bsky.social/post/3lor55huzcs23Two days too late and perhaps only funny for those speaking Dutch. (H/T Gemma Janssen.)09 May 2025 19:14 +0000at://did:plc:fccwt3dv7s4tg4nc52phy2ir/app.bsky.feed.post/3lor55huzcs23