This team found strong evidence of the existence of a middle age (2-5 Gyr) RR Lyrae star in Trumpler 5 star cluster. This challenges the existing evolutionary models and points out the role of binary associations as early producers of this type of stars. 🧪🔭 arxiv.org/abs/2509.22336

Cecilia Payne-Gaposchkin ✨ figured out what stars are made of ✨ when she was just 25. 🔭🧪 Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students. I wrote this little profile to mark the 100th anniversary of her thesis:

This is, at last, my first picture EVER of the galaxy where we live, the Milky Way. The place: San Pedro Mártir, Baja California, very close to the National Observatory. #astronomy #astrophotography

In between my science captures, sometimes I shoot a deep sky object of my liking. In this case was the turn of the Double Cluster in Perseus. Ionized hydrogen is present in this region. #astronomy 🧪🔭

The picture shows the dark molecular cloud close to the bright star Altair in the constellation of Aquila. It is cataloged as LDN 673. Molecular hydrogen, carbon monoxide, and some other molecules form these dark interstellar clouds in which stars are born. 1/3 #Astronomy

I like to experiment. This image of the Tulip Nebula (in Cygnus) is a composite of L-Ha-O III-BVR filters. The idea is to show you as much detail of the region where the first confirmed black hole is. #Astronomy

Many of the stars in our Milky Way are part of binary systems. A good percentage of these systems are composed of two stars that orbit each other at a certain distance, but there are other binaries where both of the stars are so close that we can say they almost touch each other. #AstroSci 1/13

Paracetamol, made out of plastic. This groundbreaking research, published in Nature, reveals a new and unexpected application for PET.
nature.com/articles/d41586-025... #science

Folks in the US: fight harder than you have ever fought for science - and then some. 🔭☄️ Anything less than that will be the beginning of the end of science in America. See e.g. @planetarysociety.bsky.social's resources for combating NASA cuts:

Astronomer’s feng shui… #astrophotography

How do we know that globular star clusters are one of the oldest structures of our universe? The answer is surprisingly fascinating. Picture number 1 is my latest capture of the largest known globular cluster in the Northern Hemisphere: M13, which I believe contains approximately 500,000 stars.

About 1 trillion stars, located 21 million l-y away from us, and featuring a diameter 2.5 times larger than the Milky Way: this is M101, the Pinwheel Galaxy, and I can capture it, with total impunity, with a 103 mm off the shelf telescope. If this is not mind boggling, then what is? #astronomy

Sun. #astrophotography #astronomy #sun

Rising Moon at Pathecito, Mexico. #landscape

Regarding T CrB, the star behaves in the same manner as in recent months. So we have no real clue when its outburst will happen. These are my most recent photometric observations of this recurrent nova star. (1/2) #astronomy

Faint broadband targets are almost a no-no for imagers like me living in a huge city. TBH I never thought I could pull this out: I introduce to y’all part of rho Ophiucci’s nebula! #astronomy #astrophotography

Interested in stellar physics? Orlagh L. Creevey has posted their lecture notes & recorded lecture from a day-long introduction to stellar physics with Gaia! #astroedu #stellarastro 🔭 🧪

Hey y’all! Due to the bad weather, I have been revisiting my past pictures, like this one of IC 342. I am slowly improving my processing skills. Had to share this with you. #astronomy #astrophotography

From Skylar Grayson @skylargrayson.bsky.social : Today’s paper explores a binary quasar system that’s full of mysteries! 🔭✨☄️ astrobites.org/2025/04/04/binary_quasars/

Part of tonight's moon. Enjoyed seeing Janssen (large crater just above center), and Vallis Rheita. Also cool to get a view of Mare Australe (mare in the far south east). #Moon #Astrodon #astrophotography

Nonprofit #OpenStax announced that the free, online book #Astronomy has now been used by 1.3 million students at 2100 colleges, saving them $92 million in textbook costs. Anyone can read it at: bit.ly/astronomytex... #astroedu #textbooks #freeontheweb #sciencebooks #opensource #openeducation

I found out from Wikipedia that this distant object is called Sarah's Galaxy. I find this name more appropriate than the ordinary and vulgar one that people call it. #astronomy #astrophotography

What if I tell you about a galaxy that has not one but two supermassive black holes? What if I tell you that these SMBH orbit very close to each other, at a distance of about 0.07 l-y? 1/2 #astronomy #astrophysics #astrophotography #space #nightsky #outdoors #galaxy #AGN

This Thursday, prepare yourself to witness the Lunar Eclipse on a great bilingual live stream... Find me in YouTube as: @CosmoSidewalk #astronomy #lunareclipse #lunareclipse2025

I like this galaxy very much. However, I don't know if I like it because of its "grand design" or because it reminds me of The Time Tunnel. Yes, that ancient TV show in which Tony and Douglas were inevitably lost in time. Anyway, this is M51, The Time Tunnel. #astronomy #astrophotography

Astronomers! One of the best things about the old astro-Twitter was that there was frequent discussion of the latest research. The new AstroSci feed is the perfect place to have this kind of science discussion! ☄️ If you see a cool paper - post about it!

Attention ça va vite! Cette source perd quasi 100% de son flux lumineux durant 5minutes et revient à la normale toutes les 1,8h Il faut attendre les images ~90 pour voir la cible s'effacer La source est faite de 2 ⭐: une très lumineuse et une très peu lumineuses très proches l'une de l'autre 🔭

Active Galactic Nuclei (AGN) feature a supermassive black hole at a galaxy's center. These things come in three flavors: quasars, blazars, and Seyfert galaxies. But don't get confused! They are almost the same phenomenon viewed from different angles. 1/2 #astronomy #astrophotography

A labyrinth, a mandala of dust and stars, that’s what galaxies seem to be. This one, if our estimates are correct, hosts about 400 billion stars and an outrageous amount of dust. M 63, everybody! #astronomy #astrophotography #space #constellation #stars #Outdoors #Nightsky #nightphotography #galaxy

It is not a famous target, so it is not often photographed, and there is not much information about it. It's close to the Rosette Nebula so you can find it in the Monoceros constellation. I find it to be very cool. Don't ya? #astronomy #astrophotography #space #nebula #nebulae #constellation #stars

The supermassive black hole at the center of the Milky Way appears to be having a party, complete with a disco ball-style light show. Using #NASAWebb, astrophysicists have gained the longest, most detailed glimpse yet of the “void” that lurks in the middle of our galaxy. (1/6) 🔭 🧪

hoys.space/lightcurve-o... 🔭

The best dark sky in the world - the Atacama Desert in Chile, which hosts many @eso.org telescopes - is under threat from an industrial project. 🔭 Astronomers can sign a petition in favour of moving the planned industrial project: docs.google.com/forms/d/e/1F...

Most of the fun in astrophotography is finding something new or, at least, not so common. Behold M-41, as you might not have seen it before this way. #astrophotography #astronomy #space #nightsky #nightphotography #photography #outdoors #stars #nebula #nebulae

Reflection nebulae are tough to capture bc: 1) they are dim, and therefore 2) you need a dark site, the darkest the better. This dusty region is LBN 801 in Lynx. #astronomy #science #astrophotography #nightsky #outdoors #stars

I had the chance to improve by a lot my processing techniques, and want to share with you the reprocess of these two amazing objects: Sh2-284 (such a cool nebula) and NGC2403 (an amazing galaxy that looks pretty much alike M33). #Astronomy #Science #Astrophotography #Space #Outdoors #Photography

I found the “sister” of M33. Her name, NGC2403. They are pretty much alike. Have more or less the same size, shape, and they both feature a very big nebula: NGC604 in M33 and NGC2404 in the sister galaxy. Though, they got mad of each other, and now they are millions of l-y appart #Astronomy #Science

A reminder that humans are capable of great acts of wonder when we work together & embrace knowledge. An international team of astronomers has discovered swarms of cold comets circling 74 nearby stars -- and got clear pictures of these "exocomet belts." 🧪🔭 www.iac.es/en/outreach/...

There are mighty rivals for the famous Pillars of Creation in the Eagle Nebula, like these, located in the not so famous SH2 284 nebula. You can find these in the Unicorn. #astrophotography #astronomy #space #nightsky #milkyway #nightphotography #photography #outdoors #stars #nebula #nebulae

I’ve seen too many “horse-head” nebulae, but no one like this. Pay attention to the stunning detail!

A simple setup, that is a telescope with a white Thousand Oaks filter and a Baader Solar Continuum filter, can reveal not only the sunspots and the faculae on the Sun’s photosphere, but give a hint of the convection cells as well. #astrophotography #astronomy #sun #milkyway #photography #outdoors

Together with two members of our #Astronomy club, COMETA, decided to take a picture in collaboration of this reflection nebula, NGC 2170, in the constellation Monoceros. This is a faint, dusty, but colorful place in our galaxy! Thanks, Ramón and Javier! Great job! #astrophotography #science

Together with other two members of my #Astronomy club, worked as a team to take a picture of NGC 2170, the Angel Nebula. I just finished stacking the data and the result looks very promising. This is so much rewarding! I will publish the final image very soon. So, stay tuned! #astrophotography

J0742+2704: Retains a spiral shape unlike typical quasars, which are often found in older elliptical galaxies formed after galaxy mergers, making it a rare and surprising find. Hosts a black hole over 400 million times the mass of the Sun.

Phew! My gosh! This has been the faintest narrowband deep sky object I’ve ever taken so far. SH2-224 is a SN remnant in the constellation of Auriga. Beautiful thing indeed! #Astronomy #Astrophotography #Science #Milkyway #Stars

Last weekend I spent a whole night capturing data from the high amplitude Delta Scuti (HADS) star SZ Lyn, and I got 3 complete cycles of it! This star slightly shrinks and contracts in less than every 3 hours. We know this by the shape of her light curve. #Astronomy #Stars #Science

From Skylar Grayson, Cole Meldorf, Brandon Pries, & William Smith: In this Guide, we breakdown one of the most important models in astrophysics: the ΛCDM model of cosmology! 🔭✨ astrobites.org/2025/01/06/l...

Heaven is really a mess. Chaos, rather than harmony, is what rules our universe. This ‘calmness’ that we percieve from Earth is only apparent. A testimony of this is SH2 171. #astrophotography #astronomy #space #nightsky #nightphotography #photography #outdoors #stars #nebula #nebulae #Milkyway

A real star nursery, where cold gas and dust collapse under their own gravity to form new #Stars; that’s what NGC 1333 is all about. #astrophotography #astronomy #space #nightsky #nightphotography #photography #outdoors #stars #nebula #nebulae #Milkyway