Carl Sagan was born on this day. Reflections on his legacy:
theconversation.com/carl-sagans-...
@jeanlucmargot.bsky.social
Planetary astronomer π‘ and UCLA professor. Interested in dynamics, geophysics, SETI π½. https://seti.ucla.edu/jlm
Carl Sagan was born on this day. Reflections on his legacy:
theconversation.com/carl-sagans-...
Today from 12:00 pm to 5:00 pm, UCLA is hosting its largest science fair for K-12, with nearly 70 interactive science booths staffed by real scientists. Admission is free and open to the public. Map: exploringyouruniverse.ucla.edu/booth-map/
02.11.2025 15:49 β π 1 π 0 π¬ 0 π 0Requiring an insecure back door to faculty computers is one of the worst ideas at the University of California.
www.science.org/content/arti...
I had a great time on the Search for Life panel sponsored by the UCLA Space Institute yesterday. I described four advantages of the search for technosignatures: cost, search volume, certainty of interpretation, and potential information content. arxiv.org/abs/1903.05544
22.10.2025 22:24 β π 1 π 0 π¬ 0 π 0We discussed planetary atmospheres and climate change this week in my Science in the Movies class, with an assist from The Day After Tomorrow (2004).
22.10.2025 22:17 β π 3 π 0 π¬ 0 π 0This week in Science in the Movies, I showed three scenes from Jon Amiel's The Core (2003) to illustrate planetary interior properties.
14.10.2025 16:57 β π 5 π 0 π¬ 0 π 0Dr. Fred Ramsdell (UCLA PhD 1987) is the ninth UCLA alum to receive a Nobel prize. Eight UCLA faculty have also earned the prize.
07.10.2025 05:16 β π 5 π 0 π¬ 0 π 0This unflattering opinion of Brussels is hard to reconcile with my monthlong stays there in 2024 and 2025.
www.nytimes.com/2025/10/02/o...
It felt like extortion when federal grants to UCLA were suspended. This NYT opinion piece reinforces the feeling.
www.nytimes.com/2025/10/02/o...
Search volume metrics for historical surveys and UCLA SETI
I had the privilege of presenting a brief report on UCLA SETI activities at the annual IAA SETI Committee meeting yesterday, with updates to the search volume values in our paper bit.ly/AJ23
01.10.2025 22:01 β π 1 π 0 π¬ 0 π 0Covers of nine blockbuster movies used in the class Science in the Movies
The first week of my class Science in the Movies went well. Lots of fun demos and a few scenes from the movie Gravity to illustrate Newton's laws.
01.10.2025 21:26 β π 5 π 0 π¬ 1 π 1Science Magazine β NSF held captive
www.sciencemagazinedigital.org/sciencemagaz...
The Evpatoria radio telescope was used in occasional planetary radar studies, including the detection of asteroid Golevka (Gol-Ev-Ka), named after three radio telescopes.
www.space.com/astronomy/dr...
Venus is a Solar System enigma.
Although Venus is similar in size and distance from the Sun to Earth, it has evolved very differently from our planet.
Our #Envision mission will aim to solve some of the puzzle by thoroughly studying our closest neighbour.
www.esa.int/Science_Expl... π
Basic astronomy lesson courtesy of the New York Times
www.nytimes.com/interactive/...
It should never be easier to access a gun than a vaccine.
29.08.2025 19:52 β π 2228 π 531 π¬ 25 π 20βTheyβre afraid that basic knowledge will expose their false claims.β www.nytimes.com/2025/08/31/s...
31.08.2025 14:32 β π 4 π 1 π¬ 0 π 0This excellent piece describes the deceptive practices used by quacks to advance false claims. Beware! www.nytimes.com/interactive/...
19.08.2025 11:33 β π 4 π 4 π¬ 0 π 0David Grinspoon confirms that his term appointment as NASA's Senior Scientist for Astrobiology Strategy will not be renewed and the position itself is being eliminated. He'll participate in Wednesday's Astrobiology Update (which is listed on our Calendar).
18.08.2025 14:05 β π 61 π 33 π¬ 3 π 5Los Angeles Times op-ed from colleague Steven Furlanetto
enewspaper.latimes.com/infinity/art...
Good conversation about the position in which US universities find themselves:
www.nytimes.com/2025/08/05/o...
The Belgians have created a superb walking/biking trail around Brussels. Highly recommended! environnement.brussels/citoyen/lenv...
30.07.2025 08:55 β π 5 π 0 π¬ 0 π 1Science Magazine finally recognizes it was wrong to publish arsenic paper. www.science.org/content/arti...
30.07.2025 06:47 β π 0 π 0 π¬ 0 π 0The Planetary Society will provide a NASA budget briefing on Thursday, June 12, at 12pm ET! We'll answer the top-rated scientific community questions, share everything we know, and give you our expert perspective on what's going on. Register for free here: us06web.zoom.us/webinar/regi...
11.06.2025 17:57 β π 57 π 30 π¬ 1 π 5