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Cliff Burgess

@cburgescliff.bsky.social

Particle Theorist and one Helluva Guy. (If you’re a lawyer these are my personal opinions.)

646 Posts1393 Follower217 Folgt
Cliff Burgess@cburgescliff.bsky.social · 8mo ago

Paper day. In a proposal last year we minimally describe the entire dark sector using two scalar fields, motivated by an approach to the cosmological constant problem. We recently fit this model to cosmological data and find it works better than LCDM, because it resolves the Hubble tension.

Astronomer Royal for Scotland | Catherine Heymans@astroroyalscot.bsky.social · last yr.

🚨 Oh wow. Calling the side of the world where it's still dark. Look up!! Look up!! The mega sun burp has arrived 😮 #AuroraAlert Notes: Get far away from streetlights & look for a silvery shimmer in the sky. Prop your smartphone up on a wall to take a long exposure & reveal the colours. 🤩 🔭🧪

Aurora Forecast Bot from NOAA (UNOFFICIAL)@aurora.nws-bot.us · last yr.

Aurora Forecast Update for 2025-06-01T07:04:01Z Additional Details Here.

:Product: 3-Day Forecast :Issued: 2025 Jun 01 0030 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # A. NOAA Geomagnetic Activity Observation and Forecast The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA Scale levels). The greatest expected 3 hr Kp for Jun 01-Jun 03 2025 is 7.67 (NOAA Scale G4). NOAA Kp index breakdown Jun 01-Jun 03 2025 Jun 01 Jun 02 Jun 03 00-03UT 4.00 7.00 (G3) 5.33 (G1) 03-06UT 4.00 7.67 (G4) 5.67 (G2) 06-09UT 4.00 6.67 (G3) 5.00 (G1) 09-12UT 3.67 6.33 (G2) 4.67 (G1) 12-15UT 7.67 (G4) 6.00 (G2) 4.67 (G1) 15-18UT 7.67 (G4) 6.00 (G2) 4.33 18-21UT 7.33 (G3) 5.67 (G2) 4.67 (G1) 21-00UT 7.33 (G3) 5.33 (G1) 4.33 Rationale: By midday on 01 Jun, conditions are expected to increase rapidly with the arrival of the expected CME from 31 May. G3-G4 (Strong-Severe) conditions are likely, with a chance for G5 (Extreme) levels on 01-02 Jun. G1-G2 (Minor-Moderate) conditions are expected to persist on 03 Jun. B. NOAA Solar Radiation Activity Observation and Forecast Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was above S-scale storm level thresholds. Solar Radiation Storm Forecast for Jun 01-Jun 03 2025 Jun 01 Jun 02 Jun 03 S1 or greater 75% 75% 75% Rationale: S1 (Minor) or greater solar radiation storms are expected to persist on 01-03 Jun. C. NOAA Radio Blackout Activity and Forecast Radio blackouts reaching the R2 levels were observed over the past 24 hours. The largest was at May 31 2025 0030 UTC. Radio Blackout Forecast for Jun 01-Jun 03 2025 Jun 01 Jun 02 Jun 03 R1-R2 65% 65% 65% R3 or greater 25% 25% 25% Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a slight chance for R3 (Strong), over 01 Jun - 03 Jun due to the flare potential from multiple complex regions on the Suns visible disk.
Chris Lintott @chrislintott.bsky.social · last yr.

Happy Saturn ring plane crossing day to all who celebrate.

Astronomer Royal for Scotland | Catherine Heymans@astroroyalscot.bsky.social · last yr.

It's #Saturn ring-plane crossing day! A once in a 13-15 yr event when Saturn's rings are edge on, as viewed from Earth, making them appear to disappear! I'm so infuriated that the Sun is in the way meaning no-one will see it! 😡 We'll just have to imagine it 😞 👇The last time it was seen in 1995. 🔭🧪

Two images of Saturn, one from December 1994 when you can the gorgeous ring is prominent around the planet. The one from May 1995, the ring has vanished leaving only two bright dots which are two of Saturns moons. From: https://hubblesite.org/contents/news-releases/1995/news-1995-25.html
Cliff Burgess@cburgescliff.bsky.social · last yr.

“The value today of philosophy to physics seems to me to be something like the value of early nation-states to their peoples…the insights of philosophers have occasionally benefited physicists, but generally…by protecting them from the preconceptions of other philosophers.” - Steven Weinberg

generally.by

Chad Orzel@orzelc.bsky.social · last yr.

There's an interesting question here, because there's a bit of a tension in physics between celebrating the philosophical leanings of the quantum pioneers while trying to dance around the parts where a lot of them got a little goofy.