Bohdan Paczyński fan

It's 2 o'clock in the morning. We have all been eating & drinking since 6 & X is still talking about galaxies. Do you think that is normal? - Bohdan Paczyński

[Bohdan Paczyński fan @bohpac]

Bohdan Paczynski
Lyman Spitzer Jr. Professor of Astrophysics
PhD: Warsaw University, Warsaw, Poland, 1964
https://t.co/9akeP8o0Fg

[Bohdan Paczyński fan @bohpac]

Bohdan Paczynski
Lyman Spitzer Jr. Professor of Astrophysics
PhD: Warsaw University, Warsaw, Poland, 1964
https://t.co/9akeP8o0Fg

[NicoleYunger Halpern @nicoleyh11]

Copies of the Greek translation of Quantum Steampunk have finally arrived! If you want to learn the letters on the cover, study physics.

[Bohdan Paczyński fan @bohpac]

@AndrewatL5 @ToughSf Salvage the Starships on Mars for their steel.

[Andrew Lindberg @AndrewatL5]

All Starships to Mars are expendable and only crew will return.

If you had a 150 tons of stuff to move to Mars and you start looking around for a launch vehicle to get it there which one do you choose? The new one coming out of that factory a few miles down the road or the one that’s 100 million miles away on another planet?

I’m my mind it’s going to be cheaper to use the local one.

It’s like the Asia shipping container problem, cheaper to build a new one than ship them back for reuse.

Imagine how much launching infrastructure you would need on Mars to send back every starship! You just need enough to send crews home.

[ToughSF @ToughSf]

A Starship on Mars needs to refuel itself with 6 tons a day of propellant to depart 1 year after landing.
But, the 180-247 ton mass of ISRU and power equipment needed would exceed its payload capacity:
https://t.co/zyRctsrHXi
Assumption is ~26 W/kg for both ISRU and power.

[Jason Kim @Jason_Lil_Kim]

“Last year, SCALPSS captured this first‑of‑its‑kind imagery during Firefly’s Blue Ghost Mission 1.” - @NASA

[Grycan Alain @AlainGrycan]

Starlink-2021 (ID 47604)
Mass: 260kg
July 3, 2026
Reentry : 02h01m UTC +/- 1.4 h

[Massimo @Rainmaker1973]

Google unknowingly documented an elderly couple’s life journey in Indonesia.

[NASA @NASA]

Finding asteroids before they find us.

Meet NASA scientists working to track and monitor near-Earth asteroids, and protect our planet from potential impacts. Our newest film, "Planetary Defenders," debuts on NASA+, YouTube, and X on Wednesday, April 16.

[American Astronomical Society (AAS) @AAS_Office]

The American Astronomical Society is gravely concerned by the deep cuts to NASA science funding reported to be in the draft President’s Budget Request for Fiscal Year 2026. Read more here: https://t.co/hU8iuzne3D and take action now: https://t.co/LEiFKh1tAn

[Analysis Fact @AnalysisFact]

Cesàro summation and getting rid of Gibbs phenomena https://t.co/k3UVM7mXo1

[Probability Fact @ProbFact]

Snedecor's F distribution is usually just called the F distribution, though 'F' is hard to search on by itself.

[NSF-DOE Rubin Observatory @VRubinObs]

Scientists believe clumps of dark matter are often the culprits, and the warps or holes in the streams help them figure out *how* dark matter clumps up—but the clues are still incomplete.

Luckily, Rubin Observatory is on the case! 🔎

[NSF-DOE Rubin Observatory @VRubinObs]

It's #FeatureFriday! Meet Nora Shipp, stellar streams extraordinaire ✨

Stellar streams are the torn-apart remnants of small galaxies or star clusters around the Milky Way—they hold clues about its history, and the dark matter that surrounds it.

https://t.co/JJvDIKNxJA

[NSF-DOE Rubin Observatory @VRubinObs]

Time for a reintroduction!

Vera C. Rubin Observatory is a new facility being built on Cerro Pachón in Chile (you might know us by our former name: LSST). When complete, Rubin will image the sky every 3-4 nights for 10 years, using an 8.4m telescope & 3200 MP car-sized camera! 🧵

[Massimo @Rainmaker1973]

Kanzi the bonobo lives in America and has learnt how to build a fire, light it using matches and toast marshmallows on it. It shows just how like us some primates really are

[📹 BBC One]

[Keith Strong @drkstrong]

HIGHEST SUNSPOT NUMBER IN 20 YEARS: The current daily sunspot number (270), a measure of solar activity, has reached its highest number since August 2002 (281). That was the peak of Solar Cycle 23. So much for those claiming we are in a Grand Solar Minimum!

[Xavier Luri ICCUB @xavier_luri]

Gaia is showing again its extraordinary scientific performance in areas well beyond its main goal of studying the structure and evolution of the Milky Way.

[ICCUB @ICC_UB]

👏The team counts with the participation of numerous #ICCUB-@IEEC_space members, which have contributed to the publication of the results today in the @aandaJournal 📜

😍Congratulations to all!🎉

[ICCUB @ICC_UB]

🔵#News | The @ESAGaia mission has detected the most massive #BlackHole of stellar origin in our galaxy!⚫️

🌌This type of Black Hole has been observed before in distant galaxies via #GW, but this is the first time it is found in the Milky Way✨

🔗https://t.co/h90sWPL5jQ