Why America Abandoned Arecibo Telescope For 57 years, the Arecibo Observatory in Puerto Rico was the most powerful radio telescope ever built. It discovered the first planets outside our solar system, provided indirect proof that…

Why America Abandoned Arecibo Telescope www.youtube.com/watch?v=YRW5...

The VAST Extragalactic Survey footprint, showing the number of observations of each field. The sky map is plotted with J2000 equatorial coordinates in the Mollweide projection. The VAST Galactic survey is plotted in grey for reference. Typically, each field has been observed 10–11 times to date. Image from de Ruiter et al. (2026)

Excited to announce the first data release from our ASKAP Variables and Slow Transients survey is now available!

doi.org/10.1017/pasa...

This is a database of 6.4 million measurements of 0.5 million radio sources in our survey footprint.

(By @ozgrav.bsky.social Iris de Ruiter)

#RadioAstronomy

MIST vs. YaPSI for HATS-60
👨‍💻👨‍💻👨‍💻

waps.cfa.harvard.edu/MIST/

astro.yale.edu/yapsi/

#astronomy #astronomer #astronomers #Astrophysics #astrophysicist #TESS #Python #exoplanet #Claude

Sub-Neptunes as Soot Factories: Deep Atmosphere Hydrocarbon Formation and Quenching as the Origin of Sub-Neptune Aerosol Trends Recent population-level studies of sub-Neptune atmospheres have identified a parabolic trend in transmission spectrum amplitude for planets with Teq ~ 500-800 K. While the trend has been commonly attr...

Interesting modelling study...the haziness of relatively small exoplanets might have something to do with hydrocarbon aerosol formation. Not from photochemistry, but from formation in the deep atmosphere.
Yang+ arxiv.org/abs/2604.11919
🧪🔭 #exoplanets

🧪 Wow! A huge Terra Hunting Experiment milestone has been reached from La Palma (Canary Islands): our incredible HARPS3 spectrograph will soon be ready to start hunting for Earth-like #exoplanets around Sun-like stars!

Follow @terrahunting.bsky.social below for updates ⬇️ Next stop: first light! ☀️🌍🔭

Most Close Pairs of Stars Are Born as Cosmic Twins - National Radio Astronomy Observatory The latest news from the NSF's National Radio Astronomy Observatory.

From #ALMA: A new study of infant stars in the Perseus and Orion star-forming regions suggests that most close pairs of stars are born as twins in the same disk, rather than drifting together later from larger distances.

#Astronomy #RadioAstronomy #RadioAstro

Thank you to everyone who has already donated, we’ll keep you updated by email! We still need additional materials to keep the work moving forward. 🙂

The graphical depiction shows the central region of the galaxy Mrk 501 at a frequency of 43 gigahertz on three different days. The contours indicate the intensity of the emission, while the grey circles mark bright regions within the jet, identified through model calculations. One can track the movement of the jets by following the movement of these regions. The previously known jet (Jet 1, orange guide line) pointing towards Earth is clearly visible. The newly discovered second jet (Jet 2, blue) changed its appearance within a few weeks. Both particle streams originate close to each other in the core of the galaxy. The position of the black hole (BH) associated with Jet 1 is marked with an arrow.

Astronomers have discovered two supermassive black holes that seem headed for an imminent collision.

These two black holes are so close that they could merge in just 100 years. And their radiation & jets changed dramatically over the course of a few days. 🧪🔭

www.mpifr-bonn.mpg.de/pressrelease...

SkyMapper Launches Avalanche L1 to Bring Verifiable Telescope Data Onchain; SETI Institute Joins as Partner SETI-linked observations make scientific data provably reliable and reproducible for the first time

SkyMapper Launches Avalanche L1 to Bring Verifiable Telescope Data Onchain; SETI Institute Joins as Partner www.seti.org/news/skymapp...

The Wow! Signal is #SETI’s most famous 50-year-old mystery. In just two years, #AreciboWow has uncovered new properties and a plausible explanation, bringing us closer to an answer. But it’s not alone. More signals are out there, and we need your help. phl.upr.edu/support 🔭

Exoplanets in a bottle: How laboratory experiments help us understand distant planets Characterising exoplanet atmospheres is one of the primary challenges for the coming decades and absolutely essential for our understanding of these alien worlds. Join us today as we dive into some of...

From Kasper Zoellner: Characterising exoplanet atmospheres is one of the primary challenges for the coming decades and absolutely essential for our understanding. ⚛️ 🔭 ☄️ 🧪
astrobites.org/2026/04/13/exoplanets-in-a-bottle-how-laboratory-experiments-help-us-understand-distant-planets/

Tell me why? A case for Human(e) Astrophysics Artemis, AI, Astronomy, and our place in it. The author asks why do astrophysics at all. To produce results faster, or to turn graduate students into inefficient stand-ins for software? Or because ast...

From @qwasistellar.bsky.social: Artemis, AI, Astronomy, and our place in it. The author asks why do astrophysics at all. To produce results faster, or to turn graduate students into inefficient stand-ins for software? ⚛️ 🔭 ☄️ 🧪
astrobites.org/2026/04/10/tell-me-why-a-case-for-humane-astrophysics/

The Wow! Signal is #SETI’s most famous 50-year-old mystery. In just two years, #AreciboWow has uncovered new properties and a plausible explanation, bringing us closer to an answer. But it’s not alone. More signals are out there, and we need your help. phl.upr.edu/support 🔭

New paper just dropped on TOLIMAN, a small mission to look for Earth-size planets around our next door neighbor Alpha Centauri #TOLIMAN #alphacen #exoplanets #SPIE_JATIS 🔭🪐
doi.org/10.1117/1.JA...

Images of M stars and their surrounding environment. In one of the four panels, a candidate source is seen to the left of the main star.

Contrast curves for the M dwarf stars looked at, showing contrasts from 1e-3 down the majority of them at 1e-4.

Li+ on “A Search for Wide-orbit Planets Around M-dwarfs using Deep MIRI 15 micron Images” shows how the background sensitivity of JWST enables searches down to a few Jupiter masses for targets that are typically several gigayears old. #exoplanets #astrodon

Paper day!!! 🎉 arxiv.org/abs/2604.07447 ⬇️ #exoplanets #astronomy

It all starts with planets around really small stars (M dwarfs). There's some evidence that planets around these stars form fundamentally differently than around stars like our Sun. We think that planets around these stars may 1/

Cartoon of a spiral galaxy with planets swirling around.

🪐 🤝 🌌
Join us at the Planets in the Galactic Context workshop at the @flatironinstitute.org this September!
The goal is to identify and define exciting questions at the intersection of exoplanet and Galactic science. Apply by June 5!
planet-galaxy-workshop.github.io
🔭 #galactic #exoplanets

WASP-39 YALE-POTSDAM STELLAR ISOCHRONES
Python code with help from Claude Ai
👨‍💻👨‍💻👨‍💻

github.com/JosephKarpin...

astro.yale.edu/yapsi/

#astronomy #astronomer #astronomers #Astrophysics #astrophysicist #TESS #Python #exoplanet #Claude

We have extended the deadline to this Friday, April 10th, for submitting proposals to the Iberian AtLAST Days

indico.iparcos.ucm.es/event/10/

#AtLAST #Astronomy #RadioAstronomy

The Gaia DR3 IDs for TESS Input Catalog Targets RNAAS article is now published! #exoplanets 🔭🧪

iopscience.iop.org/article/10.3...

So you already know there’s no confirmed evidence of any extraterrestrial life, and scientists worldwide are actively searching for it. Now, try to make UFO and alien enthusiasts understand and accept this. They believe the evidence exists, they are here, and that governments are hiding it. 😕

Coming up on loss of signal as #ArtemisII goes behind the Moon. For the next 40 minutes humanity is divided into two - all of us, and four of them.

The truth about #aliens and #UFOs isn’t something you can explain in a few lines. It requires training in science and engineering to understand. Without that, most people won’t be able to grasp or accept it. #Disclosure #Education

Exoplanet WASP-39 Eleanor plus LightKurve demo
With a little help from Claude Ai…
👨‍💻👨‍💻👨‍💻

github.com/JosephKarpin...

#astronomy #astronomer #astronomers #Astrophysics #astrophysicist #TESS #Python #exoplanet #Claude

Flyer for the WiCOR Lecture in Spring 2026, presented by Victoria Meadows with a photo of the speaker, a graphic of a magnifying glass looking at a planet, and a gradient background from dark blue to bright purple, along with the WiCOR and UW-Madison Logos.

The Search for Living Worlds Beyond the Solar System 🔭

Don't miss the next WiCOR Lecture from Dr. Victoria Meadows (SETI Institute)!

📆 Wed. April 22 at 7:00 PM
📍The Marquee at Union South

🔗go.wisc.edu/wicor-lecture-sp2026

🧪 #Astrobiology #exoplanets #biosignatures #spectroscopy

A variety of feed horns on top of the Green Bank Telescope

At one of the highest points on the Green Bank Telescope, above the main dish, sit feed horns atop a rotating turret containing the receivers.

📸 Credit: NSF/AUI/NSF GBO

1/3

#astronomy #radioastronomy #nrao #greenbanktelescope

Colloquium: Geospace pathfinder science at Arecibo Observatory The Arecibo Observatory housed the largest single-aperture radio telescope for approximately 50 years. A major scientific focus was studying the upper atmosphere; its highly sensitive radar facility,…

Colloquium Paper: Geospace pathfinder science at Arecibo Observatory journals.aps.org/rmp/abstract...

Colloquium: Planetary radar at the Arecibo Observatory For more than two decades, the planetary radar installed at the Arecibo Telescope was the most sensitive instrument of its kind, harnessing the penetrating power of radio waves to perform…

Colloquium Paper: Planetary radar at the Arecibo Observatory journals.aps.org/rmp/abstract...

Colloquium: Radio astronomy with the Arecibo 305-m telescope: In contemporaneous context The Arecibo Observatory, inaugurated in 1963 as the world's largest single-dish radio telescope, remained at the forefront of astronomy and atmospheric science for more than five decades, until its…

Colloquium: Radio astronomy with the Arecibo 305-m telescope: In contemporaneous context journals.aps.org/rmp/abstract...

We’re excited to announce that the Wow! Signal has finally repeated.
Same frequency. Same coordinates.
The only difference, this time it spelled "4LI3N5". 🤔
#AreciboWow #WowSignal #SETI