Martin Mašek

A pale blue dwarf galaxy seen on the black backdrop of space with some faraway galaxies. The galaxy itself resembles a fuzzy cloud of tightly-packed stars, with a broad halo of stars dispersed around it. Several small, glowing patches of gas are spread across the galaxy’s core, where very hot stars are concentrated.

This ESA/NASA #Hubble Telescope image shows a blue compact dwarf galaxy called Markarian 178 🔹

These galaxies get their name from the Armenian astrophysicist Benjamin Markarian. 🧪🔭

🔗 esahubble.org/images/potw2...

@science.esa.int @stsci.edu

Temu není Ježíšek. Kolik doopravdy stojí dárky za pár korun - VOXPOT: reportáže, které spojují Česko se světem Megalomanská reklama, praktické vychytávky za desetinu ceny. No nekupte to? Do Evropské unie každý den dorazí více než dvanáct milionů levných balíčků z online tržišť jako Temu nebo Shein. Co ale za j...

Doufám, že tam nenakupujete…

Kilauea is doing what Kilauea does.

Watch live:

www.youtube.com/watch?v=fiyt...

(h/t to @sophiecarr.bsky.social)

30 let v kosmickém prostoru včera oslavila evropská solární observatoř SOHO. Ta přitom měla podle původního plánu fungovat jen 3 roky, takže plán překonala již o 27 let.

Kromě mnoha objevů ve sluneční fyzice objevila také přes 5000 komet.

Image of comet C/1989 V1 (Aarseth-Brewington) of 1989 Dec 20, by Michael Jäger, https://fg-kometen.vdsastro.de/pix/test/bild.php?nr=8375

#bskycometography no. 365

C/1989 W1 (Aarseth-Brewington)

1989 Nov 16: Discovered by K. B. Aarseth (Norway) and H. J. Brewington (USA) at 8.5 mag. Prediscovery images of Sep 1. The comet passed perihelion on Dec 27 and reached 3 mag. It was last finally seen on 1990 Jan 31.
☄️🔭 #CometWatch

For the folks that are still struggling with this. Here is a Venn Diagram.
#3I/Atlas #3I 🔭

Image of C/1956 R1 by on 1957 Apr 27 by R. Waterfield, BAA Comet Section, https://britastro.org/cometobs/1956r1/1956r1_19570427_rwaterfield.html

#bskycometography no. 357

C/1956 R1 (Arend-Roland)

1956 Nov 8: Discovered by S. J. V. Arend & G. Roland (Belgium) at 10 mag. Predisc of Nov 7 from Japan. The comet reached 1 mag around perihelion (1957 Apr 8 at 0.32 au). Max tail 30° and 15° sunward tail! Last seen on Apr 11.
☄️🔭 #CometWatch

Image of comet C/2018 V1 on 2018 Nov 18, by Michael Jäger, https://fg-kometen.vdsastro.de/pix/test/bild.php?nr=20224

#bskycometography no. 356

C/2018 V1 (Machholz-Fujikawa-Iwamoto)

2018 Nov 7: Disc by D. E. Machholz (visual), S. Fujikawa & M. Iwamoto (Japan) at 10 mag. It's the last visual comet discovery! Perihelion on Dec 3 at 0.39 au w/ 7-8 mag. Last seen on Dec 17, possibly disintegrated.
☄️🔭 #CometWatch

A comet with a long, wiggly tail.

Michael Jäger does Michael Jäger things: C/2025 A6 (Lemmon) on Oct 26.
forum.vdsastro.de/viewtopic.ph... which also has an animation.
🔭☄️

Thanks for clarifying!

According to MPC database, the last observation of C/1984 U1 is from 1991 11 02: www.minorplanetcenter.net/db_search/sh...

The chateau in Žamberk (Senftenberg) and the castle garden, where the observatory stood from which Brorsen discovered two comets, C/1851 P1 and C/1851 U1. A nice place to visit, the garden is freely accessible. The chateau currently houses a secondary school.

Image of Theodor Johann Christian Ambders Brorsen of around 1875, https://www.jessenb.dk/Nordborg/Hvemvarde/Brorsen.html

#bskycometography no. 340

C/1851 U1 (Brorsen)

1851 Oct 22: Discovered by T. J. C. A. Brorsen (Czechia) at 4 mag with a "brilliant tail" longer than 1° and a small anti-tail. The comet was past perihelion (Oct 1 at 0.14 au) and faded afterwards. It was last detected on Nov 21.
☄️🔭 #CometWatch

Starplot Star charts and maps of the sky in Python

I've found a really good Python library to create your own Sky Maps: starplot.dev. Really amazing to prepare observation nights. And great support of his developer, Steve Berardi.

#AstroMethods

Thank you Maik!

Any information about the visual prediscovery of comet C/1978 T1? Was K. Cernis unaware when he observed it visually before oficial discovery?

Jane Goodall, primatologist and friend to chimpanzees, dies at 91 She used her global fame to draw attention to the plight of dwindling chimpanzee populations and, more broadly, to the perils of environmental destruction.

Legendary primatologist Jane Goodall has died at 91:
www.washingtonpost.com/obituaries/2...

Miluju matematické a chemické anekdoty!

Tohle mi trvalo asi 10 sekund, holt hlava už unavená. :o)))

The librarian who became Palomar’s first female telescope operator, and who discovered her own comets From 1985 to 2014, Jean Mueller supported astronomers from around the world who came to Palomar to use its iconic instruments. At the same time, she learned how to operate all three of its major teles...

This is a nice article about Jean Mueller and her career at Palomar Observatory: www.latimes.com/science/stor... .

Jean once saved me from pointing the Palomar 200-inch telescope in the wrong direction.

Srovnání velikosti prvních tří amerických kosmických lodí. Mercury dole, Gemini uprostřed a nahoře Apollo i s lunárním modulem.

Podle legendy Navahů, je Átse A ts’oosí (Orion) lovec, který napíná luk, připravený vystřelit šíp. Symbolizuje ochranu. Stojí před dětmi (Dilyéhé - Plejády), a chrání je. Jako by věděl, že i děti tady na zemi (Američané) skutečně potřebují ochranu před zlým - oranžovým - duchem.

A Bright New Comet Discovered in SOHO/SWAN Images! While comets such as 3I/ATLAS and C/2025 A6 (Lemmon) have currently been our main focus, it turned out that another interesting object — magnitude +7 — was quietly lurking in daylight! Provisionall…

Surprise! A bright new comet is entering darker skies, with a relatively close approach with Earth (~0.25 AU) in October! Read more about this discovery (provisionally designated SWAN25B) in my latest blog post! 😄
#CometWatch #ESA #NASA

Darker skies, meant I could get a much deeper image of the new comet. This is a 5 x 5 degree crop. Sep 14 9hrs UT.

Very nice image, Terry!

Discovered in USA? Shouldn't it be France? :-)

Here is some more images from Cordoba.

C/2025 A6 instead K6 :-)

Image comet C/2004 Q2 (Machholz) on 2005 Jan 6 near the Pleiades by Norbert Mrozek, https://fg-kometen.vdsastro.de/pix/test/bild.php?nr=6169

#bskycometography no. 282

C/2004 Q2 (Machholz)

2004 Aug 27: Discovered visually by D. E. Machholz (USA) at 11 mag. The comet reached a maximum magnitude of 3-4 mag shortly before perihelion which occurred on 2005 Jan 24 at 1.21 au. It was last seen on 2006 Sep 9.
☄️🔭 #CometWatch

Discovery site of comet C/1879 Q1 (Palisa), The Austro-Hungarian Imperial Naval Observatory in Pola, Istria Photograph courtesy of Österreichisches Staatsarchiv, https://www.istrianet.org/istria/astronomy/observatories/pula/index.htm

#bskycometography no. 276

C/1879 Q1 (Palisa)

1879 Aug 21: Disc by A. Palisa (Croatia) at 7.5 mag. The comet brightened towards perihelion on Oct 5 at 0.99 au. It was last seen on Oct 22.

The comet was NOT found by J. Palisa as it is written almost everywhere, it was his brother!

☄️🔭 #CometWatch

Many thanks!