Matthias Rauls

Today, that star marked with "Var!" can be imaged with a 6 inch telescope: bsky.app/profile/dobs...

But the point you are making is interesting, though!

I am sure that you are using the word lie as a rethoric hyperbole here. To me, it's just our eyes (and monitors) that are incapable of displaying and recognizing exponential brightness profiles.

A black and white photo of Albert Einstein, around age 25, sitting at a desk. He is a wearing a flannel suit and resting his right arm on the desk. Einstein is looking to the left of the photographer in this posed photo.

The first paragraph of the paper, in German. Translated to English is reads: It is known that Maxwell's electrodynamics—as usually understood at the present time—when applied to moving bodies, leads to asymmetries which do not appear to be inherent in the phenomena. Take, for example, the reciprocal electrodynamic action of a magnet and a conductor. The observable phenomenon here depends only on the relative motion of the conductor and the magnet, whereas the customary view draws a sharp distinction between the two cases in which either the one or the other of these bodies is in motion. For if the magnet is in motion and the conductor at rest, there arises in the neighbourhood of the magnet an electric field with a certain definite energy, producing a current at the places where parts of the conductor are situated. But if the magnet is stationary and the conductor in motion, no electric field arises in the neighbourhood of the magnet...

Happy 120th birthday, special relativity!

Albert Einstein introduced special relativity in the paper "On The Electrodynamics Of Moving Bodies," published in Annalen der Physik #OTD in 1905. 🧪 ⚛️ 🔭

Manuscript: onlinelibrary.wiley.com/doi/abs/10.1...
English: www.fourmilab.ch/etexts/einst...

Interesting! The word "kwaksalver" also is equivalent to the old German word for the element mercury, whick is "Quecksilber". So this could be someone who prepares mercury containing ointments which must have been quite common then.

Blue-white wisps of a galactic nebula against the backdrop of countless stars in the summer Milky Way.

A close-up of the blue-white wisps of the Eastern Veil nebula against the backdrop of countless stars in the summer Milky Way.

Constellation Cygnus hides a marvel of galactic nebulae. The Eastern Veil Nebula is part of a much larger remnant of a supernova that exploded around 8,000 years ago. This #astrophotography was created as a mosaic of two images taken with my #CelestronOrigin, each with an exposure time of one hour.

That person in the '70s is exactly me!

The yellowish tone of old stars in the center of the Andromeda galaxy contrasts with the blue from groups of hot young stars, dark dust lanes and a few small magenta blobs from ionized hydrogen clouds. The image was exposed for around 2 hours with a 6 inch Celestron Origin telescope.

In the midst of a featureless star cloud in the Andromeda galaxy, a single star is highlghted. This variable "Cepheid" star was discovered in 1923 by Edwin Hubble on photographic plates with the 2.5m Hooker telescope on Mt. Wilson. Today, a 6 inch Celestron Origin Intelligent Home observatory can image that star quite easily.

"The star that changed the size of the universe" was discovered in 1923 by Hubble on a plate taken with the 2.5m Hooker telescope. This variable Cepheid star proved that Andromeda is a far away galaxy like our own. Today, #astrophotography with my little #CelestronOrigin can show this star clearly.

Congratulations on that phantastic journey!

Sehr interessante Seite, danke! Vor allem, da ich mich da altersgemäß (und damit vorteilhaft!) einordnen kann.

This well-composed telescopic field of view covers over a Full Moon on the sky toward the high-flying constellation Pegasus. Of course the brighter stars show diffraction spikes, the commonly seen effect of internal supports in reflecting telescopes, and lie well within our own Milky Way galaxy. The faint but pervasive clouds of interstellar dust ride above the galactic plane and dimly reflect the Milky Way's starlight. Known as galactic cirrus or integrated flux nebulae they are associated with the Milky Way's molecular clouds. In fact, the diffuse cloud cataloged as MBM 54, less than a thousand light-years distant, fills the scene. The galaxy seemingly tangled in the dusty cloud is the striking spiral galaxy NGC 7497. It's some 60 million light-years away, though. Seen almost edge-on near the center of the field, NGC 7497's own spiral arms and dust lanes echo the colors of stars and dust in our own Milky Way.

Galaxies, Stars, and Dust

#astronomy #astrophotography #apod

The contrasting spiral arms of a galaxy, with old stars in yellow, young and hot groups of stars in blue and some tiny specs of magenta for glowing hydrogen gas.

The star that expanded the universe was discovered by Edwin Hubble in 1923 with a 2.5m telescope. The Cepheid star V1 gave first prove that Andromeda is a galaxy outside our milkyway. Today, this #Astrophotography with my little #CelestronOrigin clearly shows this star in the gorgeous spiral of M31.

35 Philosophical Concepts That Don't Exist in English (But Totally Should) 1-10: Concepts About Self & Identity • Ubuntu (Zulu/Xhosa) - "I am because we • Shinrin-yoku (Japanese) "Forest are"; the idea that our humanity is shaped bathing"; a meditative appreciation of nature. through community. • Lagom • Tatemae & Honne (Japanese) - The (Swedish) - Not too much, not too little - just the right amount. contrast between a person's public face • Kalpa (Sanskrit) - A cosmic unit of time; (tatemae) and their true feelings (honne). often used in Hindu and Buddhist • Janteloven (Scandinavian) - The cultural cosmology. belief that no one is better than anyone • Memento mori (Latin) - "Remember you else; humility over individualism. • Ikigai (Japanese) - Your reason for being; must die"; a reflection on mortality and the value of life. the intersection of passion, mission, $ 21-30: Emotions, Relationships & Human vocation, and profession. Nature • Duende (Spanish) - A mysterious, soul-stirring emotional • Kaukokaipuu (Finnish) - A longing for power, often distant places you've never been. experienced through art or music. • Kintsugi (Japanese) - The art of repairing * Jayus (Indonesian) - A joke so badly told that it becomes funny again. broken pottery with gold, symbolizing • Mamihlapinatapai (Yaghan) - The look beauty in imperfection and healing shared by two people who want to act • Zanshin (Japanese) - A state of relaxed but hesitate. alertness and focused awareness, • Forelsket (Norwegian) - The euphoria of especially in martial arts. falling in love. • Gezelligheid (Dutch) - The warm, collective comfort of being with loved • Humorebi (Japanese) - The sunlight that filters through the leaves of trees. ones. • Mokita (Kivila, Papua New Guinea) - The • Wabi-sabi (Japanese) - A worldview truth everyone knows but no one says. centered on accepting transience and • Ya'aburnee (Arabic) - Literally "you bury imperfect beauty. me"; a declaration that life without the • Sprezzat…

As an antidote to the constantly dreadful news, have some philosophical concepts:

About 8,000 years ago, a star exploded in the constellation Cygnus. Today, we can observe the faint remnants of this supernova as the "Veil Nebula". This astrophotography was composed of two 1h exposures taken with my @celestronuniverse.bsky.social‬ Origin telescope and developed in #Pixinsight.

Das Problem sind ja nicht die 40 Schnitzel, sondern die Aufgabe, deren Energie in, sagen wir, einer Zehntelsekunde umzusetzen. Dann sind wir bei einer momentanen Leistung von 1,5GW!

Toll geschriebener, sehr interessanter und informativer Text!

Möglicherweise nicht mitgerechnet: Posts in den "sozialen" Medien und Chats. Aber wenn man für "Outreach" verantwortlich ist: sind solche Zahlen dann nicht zu erwarten?

Unaere europäischen Hörgewohnheiten machen es leider schwer, die Feinheiten / das Herausragende an so einem Musikstück zu erfassen. Aber es spricht trotzdem etwas an, wenn man sich darauf einlässt.

A gas nebula glowing in intensive blue and red light in front of a star-spangled milkyway.

A few thousand years ago, the star at the center of the Dumbbell Nebula (Messier 27) ejected its outer gas envelope at the end of its life, which it now illuminates from within. This #astrophotography was exposed for one hour near full moon with my #CelestronOrigin and developed in Pixinsight.

Taupunkte bis 30°C - um Himmels Willen! 🥵

Den Artikel zur tunebaren Schmalbandfotografie der Sonne fand ich beeindruckend. Die Sonne im Licht einer Helium-Linie - wann hat man so etwas schon mal (von Amateuren) gesehen? Wahnsinn, was manche "Amateure" hinkriegen!

In front of a dark sky colorful stars shine together with the blueish-green-red gas remanants of a dying dwarf star. The scene is decorated with a tine spiral galaxy in the far distance.

Two very different objects shine in this #astrophotography with my #CelestronOrigin. In Ring Nebula M57 in constellation Lyra, an ejected gas shell glows in the hard UV light of a 75000K hot dwarf star from 2300LY. The galaxy next to it (IC1296, 250Mio LY) is larger than our milkyway but very faint.

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Heute gelernt: Die physikalischen Einheiten-Vorsätze kommen zum Teil aus dem Dänischen. Femten als dänisches Wort für 15 wurde zur Vorsilbe "Femto", wobei z.B. ein Femtometer 10 hoch minus 15 Meter sind. Analog bei atten, dänisches Wort für 18, ein Attometer sind 10 hoch minus 18 Meter.

Gas clouds in the milky way are glowing in an intense blue which contrast with the brownish clours of surrounding molecular clouds.

The Iris Nebula (NGC7023) bears its name because gas clouds reflect the bluish light of very hot neighboring stars. It is surrounded by molecular dust clouds with embedded brownish carbon compounds. This #astrophotography with my Celestron Origin was exposed for 160min and developed in Pixinsight.

The Presidents Budget Request for NASA is out. It’s a bloodbath

Canceled are DAVINCI, VERITAS, Juno, OSIRIS-APEX, US participation in ExoMars and EnVision…

Huge cut to R&A. No funding to begin development of the Uranus Orbiter.

If you’ve ever cared about NASA, time to contact congress.

Not good news for gravitational-wave or multimessenger astronomy "In FY 2026 NSF will operate only one of the two [LIGO] sites and will support a reduced level for technology development"

☄️⚛️🧪🔭

A galaxy with blueish spiral arms and a large dark dust band around its yellow-brownish core, dubbed the "Blach Exe Galaxy".

Galaxy Messier 64 at a distance of 24Mio LY is also known as "Black-Eye Galaxy" because of its characteristically shaped dust band. This #astrophotography with my @celestronuniverse.bsky.social Origin telescope is based on an exposure time just under half an hour and was developed in #Pixinsight.

Ich hab mir gedacht, ich erkläre heute mal diese Kurven, die ich fast jeden Tag in meiner Tagesübersicht als Tweet 3/5 mitschicke.

Abgesehen davon, dass sie sehr bunt sind, widerlegen sie nämlich einige weit verbreitete Vorurteile zum Stand der #Energiewende in Deutschland...

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Galaxy M104 is also known as the “Sombrero Galaxy” because of its striking shape. With an exposure time of 140 minutes, this #astrophotography with my #Celestron #Origin shows numerous globular clusters in the galaxy's halo, structures in the dust disk and many faint galaxies in the background.