Andrew Hoffman

Neat new paper out on 3I/ATLAS discussing its discovery, orbit, and characterization. 🔭

arxiv.org/pdf/2507.02757

Not made with AI - awesome!

A time-lapse of some images of asteroid (52246) Donaldjohanson during the encounter by Lucy!

Images taken on April 20, 2025, from a distance of 1,600 to 1,100 km.

Credit: NASA/Goddard/SwRI/Johns Hopkins APL

science.nasa.gov/image-articl...

#PlanetSci #SciComm 🧪

Here is a summary of observations from both
Gemini telescopes in March 2025, divided by instrument and color-coded by location. Gemini's ZORRO 🦊 took the most observations this month, totaling 4,600! #astronomy

Very cool, thank you for sharing! Looks like that link is broken at the moment but it is always interesting to see these objects evolve, including in designation.

This activity is definitely CO2 driven, at least in part, which is why it’s so active!

testing something

An artist's impression of the Gaia spacecraft.

The @esa.int Gaia satellite will take its final scientific measurements on Wednesday. 🔭

This will conclude a 12 year series of continuous observations.

Larger Gaia data releases are still in progress, but Gaia has already had a HUGE impact on our understanding of the #milkyway.

(Image: ESA)

A spiral galaxy from the Galaxy Zoo: Hubble project, classified by 46 volunteers.

A spiral galaxy, observed with the Hubble Space Telescope in the COSMOS survey.

It is at redshift 0.36 (lookback time 4.09 billion years) with coordinates (150.01663, 1.87030).

46 volunteers classified this galaxy in Galaxy Zoo: Hubble.

A nearly terrestrial D/H for comet 67P/Churyumov-Gerasimenko Analysis of Rosetta measurements suggests that Jupiter family comets could have delivered much of Earth’s water.

🚨🚨New paper alert!! 🚨🚨🧪🔭
Today we published exciting new results from the Rosetta mission! These results have big implications for where the comet formed and for whether comets could have supplied water to Earth. #PlanetaryScience #Rosetta 🧵1/n
www.science.org/doi/10.1126/...

Black and white photo portrait of Annie Jump Cannon. She is wearing a white blouse or shirt with a frilly collar that fades into the white background of the photo, and a dark choker around her neck. Her hair is pulled back and she is looking to the left of the camera.

Astronomer Annie Jump Cannon was born #OTD in 1863. She was a pioneer of stellar classification and co-creator of the Harvard Classification Scheme.

Over her lifetime she *manually* classified around 350,000 stars. (1/n) 🧪 🔭 👩‍🔬 ⚛️

Image: Harvard University, Radcliffe Archives

It looks like it's from a sci-fi film, but this is a real photo.

Neptune and its captured moon Triton, out there in the dark.

Seen by Voyager 2, in 1989.

Scientists, academics, researchers: We’re excited to share that @altmetric.com is now tracking mentions of your research on Bluesky! 🧪

The long period comet C/2021 C5 at 5.79 au from the sun. Imaged with Gemini North/GMOS.

The “Pale Blue Dot” Blues This Beyond Astrobites post discusses reconciling a career in astrophysics with eco-anxiety. When surrounded by our Earthly problems, specifically climate change, how can we find fulfillment in our…

Beyond just astrochemistry, I am passionate about using our understanding of other planets to better understand our own (and advocate for) Earth. A few years ago, I published an article in @astrobites.bsky.social on astrophysics and eco-anxiety (astrobites.org/2021/06/04/a...).

The long period comet C/2020 U4 at 8.06 au from the sun. Imaged with Gemini North/GMOS.

A comet is seen as a fuzzy, tailed blob against a backdrop of stars.

The long period comet C/2021 X1 at 5.14 au from the sun. Imaged with Gemini North/GMOS.