As a result of the recent news, we have received an extraordinary number of messages, and it has been incredibly moving to read so many heartfelt expressions of support. www.jodrellbank.net/explore/stor...

A message of Thanks from Jodrell Bank Observatory - Jodrell Bank

As a result of the recent news, we have received an extraordinary number of messages, and it has been incredibly moving to read so many heartfelt expressions of support.

jodrellbank.net

A defunct #Starlink satellite just re-entered in the atmosphere over the Netherlands. These images were captured by my allsky camera. This was one of the early Starlink satellites, having been launched in August 2020.

Most of the world Wi-Fi usage operates around the 2.4 GHz band (allocated spectrum). That means our telescopes have to cut that portion of the band out when doing #RadioAstronomy Tommy from our team has tested some mitigation methods and found we can use 90% of this band! arxiv.org/abs/2605.30761

CCSDS 8192-bits CADUs, RSS 223/255 I=4

Radiotelescoop Dwingeloo@radiotelescoop.bsky.social · 2mo ago

With the 25m Dwingeloo radio telescope, we just tracked #Tianwen-2 on X-band. It was at an offset of 1.1 degrees from asteroid Kamo'oalewa, which it is going to visit. We recorded IQ data, maybe others can decode this (@destevez.net, @aang23.satdump.org?). Data at data.camras.nl/satellites/r....

We're still tracking #Artemis II with the Dwingeloo radio telescope, with four very enthousiastic amateurs staying up all night in the control room. We just witnessed the Orion upper stage separation burn in our doppler tracking.

A first view on Artemis II from South America on 2026-04-02, 01:57:58 UTC

We are tracking #Artemis II with the historic Dwingeloo radio telescope. In the doppler shift of the carrier signal we see the manual manoevers that the astronauts perform while flying formation with the upper stage.

We have AOS from #Artemis II!

The #fireball of 8 March was captured on camera by DAARO! on the roof of ASTRON.

What is the origin of 1LHAASO J0343+5254u? by @hen_edler, @itsMariaArias, myself, @cbassa.bsky.social Our multi-band analysis suggests that the PWN candidate previously proposed to be its origin is actually an obscured galaxy cluster, unrelated to the LHAASO emission arxiv.org/abs/2603.03164

It still seems unreal to me that humans will soon be flying back to the moon! They will be returning to Earth at a speed of 40.000 km/h, the fastest ever reentry of a crewed spacecraft. This remastered video shows a similar reentry from the #Artemis 1 mission back in 2022 at 9x speed. 🔭🧪

Great aurora visible in Dwingeloo yesterday!

An 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. #auroraBorealis

Picking 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.

Last Thursday, a group of European radio telescopes (HyperFlash / ÉCLAT) detected a flash from the repeating Fast Radio Burst discovered end of December. We also detected this burst! Our detection came in too late to be included in the telegram, but here it is! www.astronomerstelegram.org?read=17588

Snow in Dwingeloo. #bluesky

Since 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.

I put together a mosaic of 2025 from the timelapse camera on my roof jwheare.com/year-mosaic/... (not a keogram, but inspired by @cbassa.bsky.social)

2025 Year Mosaic

Full year mosaic for 2025 from a roof camera in Fife

jwheare.com

Cees Bassa@cbassa.bsky.social · 7mo ago

Happy 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.

Happy 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.

It's cleared up in Sydney and I can see the shadow creeping across the Moon! 🥳🌚🔭

Dr Laura Driessen@astrolaura.com · 11mo ago

Lunar eclipse fans, there's a total lunar eclipse this weekend! All of Australia (and a bunch of other countries) will be able to see all the best bits. The eclipse will be in the evening of Sunday the 7th or the morning of Monday the 8th of September 🧪🔭🌝 www.abc.net.au/news/science...

💥Greater (partial) success for #amateurradio and #amsat satellite operators in dispute with AST Spacemobile over commercial use of the 430-440 MHz amateur radio band for TT&C! 💥 In its reference Attachment to the recent grant, dated August 29, 2025, the FCC imposes clear limits ⬇️

NOAA-15 was decommissioned today at 15:26 UTC, with its AVHRR/3 Instrument still in better state than the last 2 remaining on MetOp-B & C. It wouldn't be so disappointing if this wasn't done for the wrong reasons... Makes you wonder what happened to NOAA.

#skao2025 Federico Di Vruno on impact of satellites on #RadioAstronomy from intended emissions (strong enough to saturate receivers) & unintended electromagnetic radiation (originating from on satellite electronics). In future 🛰️ constellations could impact 25% of our observing time! 🔭📡🧪

New paper day! In 'Near-future rocket launches could slow ozone recovery', we show that scaling up use of launch vehicles 🚀 has a point where the healing of the ozone layer is affected 🧪🛰️ Open access, free to read & share

Near-future rocket launches could slow ozone recovery

npj Climate and Atmospheric Science - Near-future rocket launches could slow ozone recovery

rdcu.be

Here, strf was used by the UVSQSat-NG team : - at the beginning of the mission to optimize the preliminary TLEs so that the university could establish the most reliable communication possible, - for monitoring purposes since refined TLEs have become available... Thank you for the great work!

Unfortunately the surface of the Moon is also quite hard.

We lost HAKUTO-R M2 signal suddenly

We have lost signal of Hakuto-R M2 Resilience! We saw the signal and its Lunar reflection close to each other before LOS, indicating that it was very close to the surface when the signal disappeared. Space is hard!