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Matthias Rauls

@dobsonaut.bsky.social

Hobby astronomer who loves to share his inspiration

211 Posts209 Follower 208 Folgt

Matthias Rauls @dobsonaut.bsky.social · 2d ago

Last Sturday night I unknowingly caught a supernova in the act. While taking an #astrophotography of Stephan's Quintett with my Celestron Origin, I just by chance captured an image of SN2026aaiv in NGC7331. What are the chances for such a coincidence? 90min of data processed in Pixinsight.

Matthias Rauls @dobsonaut.bsky.social · 2w ago

The universe around us is not static at all. Throughout the Milky Way, clouds of gas and dust are clumping together, constantly giving birth to still hidden new stars. I took this #astrophotography of the Elephant Trunk Nebula with my #Celestron #Origin right from the center of a city.

Against a backdrop of reddish, glowing hydrogen gas, dark clouds of gas and dust conceal the formation of new stars that are not yet visible. The image is dotted with blue and red stars from our Milky Way.

Matthias Rauls @dobsonaut.bsky.social · 4w ago

17s of solar eclipse captured on Mallorca with my smartphone - sound on for this peculiar #astrophotography!

Matthias Rauls @dobsonaut.bsky.social · last mo.

What a world we could have!

Galaxy Map@galaxymap.bsky.social · last mo.

For me, Star Trek was the most inspiring television program I ever saw. Made less than 25 years after the second world war and during the cold war and civil rights struggle, the show had Japanese, Russian and Black characters and the heroes were scientists and explorers. A future to dream for.

Matthias Rauls @dobsonaut.bsky.social · 2mo ago

A dying star in Cygnus gives its final performance exhibiting its colorful outer shells. Blue OIII filaments on the outside contrast with clumps of denser structures formed during explosive outbursts. This #astrophotography by my @celestronuniverse.bsky.social #Origin was processed in #Pixinsight.

A yellowish-red, jellyfish-like structure composed of gases from a Wolf-Rayet star is embedded in a sea of Milky Way stars and glowing red hydrogen clouds.

Matthias Rauls @dobsonaut.bsky.social · 3mo ago

With an age of 13b years, Globula Cluster Messier 5 is almost 3x older than our sun. Despite its age, it houses many seemingly young "blue straggler" stars that are in fact the product of mergers of old stars. This #astrophotography taken with my #Celestron Origin has been processed in #Pixinsight.

Countless blue and orange stars packed tightly into a tiny sphere form the globular star cluster Messier 5.

Matthias Rauls @dobsonaut.bsky.social · 4mo ago

The Iris Nebula in constellation Cepheus is illuminated by the blueish light of its central star. Just as a lotus is rooted in mud, the Iris is surrounded by brownish soot nebulae. This #astrophotography was taken over 8h with my @celestronuniverse.bsky.social Origin from a light-polluted suburb.

Brownish cosmic clouds surround the brightly blue illuminated core of the Iris nebula.

Matthias Rauls @dobsonaut.bsky.social · 5mo ago

Galaxy M51 is undergoing a phase of rapid star formation, triggered by interaction with its cosmic neighbour. Blue hues indicate regions with young, hot stars, whilst yellow hues represent old stellar populations. This #astrophotography was taken with my Celestron Origin in >8 hours of exposure .

Corey S. Powell @coreyspowell.bsky.social · 8mo ago

The universe is still full of surprises! This is Cloud-9, a starless blob held together by dark matter--a "failed galaxy." Astronomers have long speculated that such hidden objects formed the building blocks of bright galaxies like our own. Now we've found one. 🧪🔭 esahubble.org/news/heic2601/

This image shows the location of Cloud-9, which is 14 million light-years from Earth. The diffuse magenta is radio data from the ground-based Very Large Array (VLA) showing the presence of the cloud. The dashed circle marks the peak of radio emission,which is where researchers focused their search for stars. Follow-up observations by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys found no stars within the cloud. The few objects that appear within its boundaries are background galaxies. Before the Hubble observations, scientists could argue that Cloud-9 is a faint dwarf galaxy whose stars could not be seen with ground-based telescopes due to the lack of sensitivity. Hubble’s Advanced Camera for Surveys shows that, in reality, the failed galaxy contains no stars.

Matthias Rauls @dobsonaut.bsky.social · 9mo ago

M31 is our neighbor in the ocean of the universe. I recently showed that my telescope can detect individual stars 2.5Mio LY away. Imaging the entire galaxy with the same telescope is more difficult. This #astrophotography with my #CelestonOrigin is a mosaic from 6 images, each 1h of exposure time.

A yellowish shining spiral galaxy with dark brownish dust bands and blueish groups of young hot stars.

Matthias Rauls @dobsonaut.bsky.social · 11mo ago

Have you yet seen two lava fountains close to each other? Check this live cam from Kilauea: www.youtube.com/live/BqmpkUd...

[V3cam] Kīlauea volcano, Hawaii (south Halemaʻumaʻu crater)

YouTube video by USGS

youtube.com

Robert McNees @mcnees.bsky.social · 12mo ago

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...

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...

Matthias Rauls @dobsonaut.bsky.social · 12mo ago

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.

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.

Matthias Rauls @dobsonaut.bsky.social · 12mo ago

"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.

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.

astropicdaily @astropicdaily.bsky.social · last yr.

Galaxies, Stars, and Dust #astronomy #astrophotography #apod

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

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

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.

Mark Chadbourn @chadbourn.bsky.social · last yr.

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

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…

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

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

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

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.

Matthias Rauls @dobsonaut.bsky.social · last yr.

😱

Simon Kuestenmacher@simongerman600.bsky.social · last yr.

In May 2025, fires broke out in Canada. The smoke covered US skies too. Following a warm, dry spring, high winds fueled wildfires that have grown to seven times the ten-year average. More than 200 fires have broken out, most of them started by (really dumb) humans. Source: buff.ly/uiYQrCf

Markus Pössel @mpoessel.de · last yr.

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.

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

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

Sarah Hörst @planetdr.bsky.social · last yr.

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.

Christopher Berry @cplberry.bsky.social · last yr.

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" ☄️⚛️🧪🔭

Dan Garisto@dangaristo.bsky.social · last yr.

Presidential budget is out. Here's NSF. Biggest cut, by amount, is $1 billion, or 66.8%, from MPS (Physics & Math directorate). nsf-gov-resources.nsf.gov/files/00-NSF...

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

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

klstone / Klaus Steinfelder @klstone.bsky.social · last yr.

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... 1/12

Matthias Rauls @dobsonaut.bsky.social · last yr.

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.

Astronomy Picture of the Day (unofficial bot)@fanapod.baldanders.info · last yr.

#apod 2025-05-07 Galaxy Wars: M81 versus M82 Image Credit: Collaborative Astrophotography Team (CAT) Web page: https://apod.nasa.gov/apod/ap250507.html

Matthias Rauls @dobsonaut.bsky.social · last yr.

The “Whirlpool Galaxy” M51, about 24Mio LY away, is subject to strong gravitational interactions with its companion galaxy. Countless stars are torn out of both galaxies and form extensive tidal tails. This #astrophotography image was made from 2.5h of data with my #Celestron #Origin in #Pixinsight.

Two interacting galaxies glow in the colors of young and hot blueish stars, the yellowish tone of old and mature stars and exhibit magenta colored blobs of of excited hydrogen atom nebulae.