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Search results for tag #astronomy

[?]Project Gutenberg » 🌐
@gutenberg_org@mastodon.social

Naming the Universe

How the quick thinking of internationally minded astronomers avoided stamping the solar system with petty European rivalries

by Stephen Case

aeon.co/essays/how-gods-beat-a

Books by John Herschel at PG:
gutenberg.org/ebooks/author/48

Planetary System. Eclipse of the Sun. The Moon. The Zodiacal Light. Meteoric Shower. From Yaggy’s Geographical Study, 1887. An illustrated educational diagram depicting the solar system with orbital paths around a central sun, comets, and the zodiacal light. The corners feature vignette illustrations of related astronomical phenomena: a solar eclipse, the moon, the zodiacal light, and a meteoric shower. https://fr.wikipedia.org/wiki/Fichier:Levi_Walter_Yaggy_Planetary_System_1887.jpg

Alt...Planetary System. Eclipse of the Sun. The Moon. The Zodiacal Light. Meteoric Shower. From Yaggy’s Geographical Study, 1887. An illustrated educational diagram depicting the solar system with orbital paths around a central sun, comets, and the zodiacal light. The corners feature vignette illustrations of related astronomical phenomena: a solar eclipse, the moon, the zodiacal light, and a meteoric shower. https://fr.wikipedia.org/wiki/Fichier:Levi_Walter_Yaggy_Planetary_System_1887.jpg

    JJDavis :terminal: boosted

    [?]Meg Schwamb [she/her] » 🌐
    @megschwamb@mastodon.online

    "Vera C. Rubin Observatory *@VRubinObs ) days away from launching decade-long sky survey. After years of construction and months of testing, the Chilean mountaintop telescope is nearly ready to begin the most ambitious astronomical survey ever attempted." astronomy.com/science/vera-c-r

      oheso boosted

      [?]astropic » 🤖 🌐
      @astropic@mastodon.social

      Roche Division Shadow Caster

      The moon Prometheus casts a shadow on Saturn F ring near a streamer-channel it has created on the ring. The image was taken as the planet approached its August 2009 equinox.

      More: images.nasa.gov/details/PIA115
      Credit: NASA/JPL/Space Science Institute

      The moon Prometheus casts a shadow on Saturn F ring near a streamer-channel it has created on the ring. The image was taken as the planet approached its August 2009 equinox.

      Alt...The moon Prometheus casts a shadow on Saturn F ring near a streamer-channel it has created on the ring. The image was taken as the planet approached its August 2009 equinox.

        oheso boosted

        [?]Ed Wiebe » 🌐
        @edwiebe@scribili.masto.host

        Here's peeking out from behind the . Seen from .

        Venus is peaking out from behind the slender daylight crescent moon.

        Alt...Venus is peaking out from behind the slender daylight crescent moon.

          JJDavis :terminal: boosted

          [?]Christopher Kyba 🇨🇦🇪🇺 » 🌐
          @skyglowberlin@fediscience.org

          Any astronomers looking for a wild new job?

          I got a message from an ecologist in Belgium today, and he's looking for a postdoc with experience in photometry to work on analysis of all-sky imagery for an experiment on the impact of on birds.

          This is not a job offer! He would work together with the candidate on an internal university grant.

          If anyone is interested (PhD in or closely related field required), send me a message.

            [?]R.L. Dane :Debian: :OpenBSD: :FreeBSD: 🍵 :MiraLovesYou: [he/him/my good fellow] » 🌐
            @rl_dane@polymaths.social

            Today's #APOD is especially for #VanGogh fans. =)

            Date: 2026 June 19
            URL: https://apod.nasa.gov/apod/ap260619.html
            Title: Starry Night II

            #NASA #Astronomy #PictureOfTheDay #StarryNight

              oheso boosted

              [?]Santiago Andrés Triana » 🌐
              @repepo@fediscience.org

              almost occulted by the today, as seen from .

              Alt...Time-lapse video of the Venus-Moon conjunction today. The Moon, a tiny sliver, is only 10% illuminated, and Venus appears bright a fraction of a degree above. Both drift from top left to the bottom right corner as the camera does not track their motion. Some clouds pass by.

                CMDR Yojimbosan 🅅⁂ boosted

                [?]Jon Sullivan » 🌐
                @joncounts@mastodon.nz

                One of the advantages of being in the week of the shortest days of the year is biking home from work after dark, in cold clear air, with the universe sparkling overhead.

                Here's this evening with the Moon, Venus, Jupiter, and Mercury all lined up above the western horizon, from Lincoln, NZ.

                flickr.com/photos/mollivan_jon

                A photo at twilight with the last orange glow of the day along the horizon behind silhouetted trees. In the sky, in a line, are the crescent Moon, Venus, Jupiter, and Mercury.

                Alt...A photo at twilight with the last orange glow of the day along the horizon behind silhouetted trees. In the sky, in a line, are the crescent Moon, Venus, Jupiter, and Mercury.

                A closer cropped view of the photo showing, in a line from top right, the crescent Moon, Venus, Jupiter, and Mercury.

                Alt...A closer cropped view of the photo showing, in a line from top right, the crescent Moon, Venus, Jupiter, and Mercury.

                  Vassil Nikolov | Васил Николов boosted

                  [?]Paolo Amoroso » 🌐
                  @amoroso@oldbytes.space

                  Venus is the bright dot close to the lunar crescent, which has a hint of earthshine. Jupiter is the dimmer dot near the center. A jet contrail to the top of Jupiter photobombs the framing, or makes it nicer depending on how you view it.

                  I took the photo with my Pixel 7 Pro phone from Milan, Italy, on June 17, 2026 at 20:08 UTC.

                  View of an urban area at dusk from an upper floor of an apartment building, with some treetops at left and the upper floors of apartment buildings in the distance at the horizon, near the bottom right of the frame. On the clear sky, close to the thin lunar waxing crescent, is a bright white dot. To the top of this pair is the horizontal, thin, short white line of a jet contrail. At the center of the frame is a dimmer white dot.

                  Alt...View of an urban area at dusk from an upper floor of an apartment building, with some treetops at left and the upper floors of apartment buildings in the distance at the horizon, near the bottom right of the frame. On the clear sky, close to the thin lunar waxing crescent, is a bright white dot. To the top of this pair is the horizontal, thin, short white line of a jet contrail. At the center of the frame is a dimmer white dot.

                    [?]Project Gutenberg » 🌐
                    @gutenberg_org@mastodon.social

                    What Would Happen if the Sun Stopped? Part 2: Kelvin and Helmholtz at the Ready

                    By Paul Sutter

                    universetoday.com/articles/wha

                    About Kelvin-Helmholtz mechanism:
                    en.wikipedia.org/wiki/Kelvin%E

                    Books by Baron Kevin and Helmholtz at PG
                    gutenberg.org/ebooks/author/48
                    gutenberg.org/ebooks/author/59

                    William Thomson, Lord Kelvin, whose famously wrong answer for the Sun's age turns out to be exactly the calculation we need. A black-and-white studio portrait of Lord Kelvin with white hair and a full white beard, wearing a formal suit, waistcoat, tie, and watch chain. He has a serious expression and is looking slightly away from the camera. https://upload.wikimedia.org/wikipedia/commons/d/db/Kelvin-1200-scale1000.jpg

                    Alt...William Thomson, Lord Kelvin, whose famously wrong answer for the Sun's age turns out to be exactly the calculation we need. A black-and-white studio portrait of Lord Kelvin with white hair and a full white beard, wearing a formal suit, waistcoat, tie, and watch chain. He has a serious expression and is looking slightly away from the camera. https://upload.wikimedia.org/wikipedia/commons/d/db/Kelvin-1200-scale1000.jpg

                      [?]Anthony Horton » 🌐
                      @spacelizard@aus.social

                      Decided to take advantage of what may be the only clearish night for at least the next week and a half to get some telescope time on Eta Carina before it gets too low.

                      I am impressed by the ability of the internal dual narrowband light pollution filter and automatic image processing to extract pretty pictures of emission nebulae from murky, heavily light polluted skies in suburban Sydney. I know exactly what it's doing and why it works but when you see it in action, in real time, it still feels almost magical.

                      Photo of a Seestar S30 Pro on a tripod next to fence, with partially cloudy skies above and lots of ambient light around.

                      Alt...Photo of a Seestar S30 Pro on a tripod next to fence, with partially cloudy skies above and lots of ambient light around.

                      Screenshot of the Seestar app showing an imaging session of the Eta Carina nebula in progress.

                      Alt...Screenshot of the Seestar app showing an imaging session of the Eta Carina nebula in progress.

                        oheso boosted

                        [?]Anthony Horton » 🌐
                        @spacelizard@aus.social

                        OK, that turned out pretty well!

                        This was just under 4 hours worth of images of the Eta Carina Nebula, processed in Siril. Not bad for a 30 mm aperture telescope in an urban location.

                        Image of the Eta Carina Nebula from a Seestar S30 Pro smart telescope, manually processed in Siril. The image is full of pink glowing nebulosity and many, many stars.

                        Alt...Image of the Eta Carina Nebula from a Seestar S30 Pro smart telescope, manually processed in Siril. The image is full of pink glowing nebulosity and many, many stars.

                          oheso boosted

                          [?]Khurram Wadee ✅ » 🌐
                          @mkwadee@mastodon.org.uk

                          Triple from Crossing
                          of the Day

                          apod.nasa.gov/apod/ap260615.ht

                          Supersonic rocket producing a shockwave in front of the Sun.

                          Alt...Supersonic rocket producing a shockwave in front of the Sun.

                            muddle boosted

                            [?]Project Gutenberg » 🌐
                            @gutenberg_org@mastodon.social

                            June 1980: Vera Rubin Publishes Paper Hinting at Dark Matter

                            Work by Rubin, a champion of women in science, suggested that galaxies contain hidden mass.

                            By Tess Joosse (from the archives)

                            aps.org/apsnews/2023/05/vera-r

                            Her autobiographical article is available online:
                            annualreviews.org/content/jour

                            Vera Rubin, Dept. of Terrestrial Magnetism, Carnegie Institute of Washington. Elderly white-hairedVera Rubin smiling warmly, wearing a red jacket, photographed outdoors in natural light. https://commons.wikimedia.org/wiki/File:Vera_Rubin.jpg

                            Alt...Vera Rubin, Dept. of Terrestrial Magnetism, Carnegie Institute of Washington. Elderly white-hairedVera Rubin smiling warmly, wearing a red jacket, photographed outdoors in natural light. https://commons.wikimedia.org/wiki/File:Vera_Rubin.jpg

                              oheso boosted

                              [?]Khurram Wadee ✅ » 🌐
                              @mkwadee@mastodon.org.uk

                              Inspired by today’s , here is my version of the of (left) and as seen after in the of the . This was taken with a and a 1 s exposure.

                              Venus and Jupiter together tonight.

                              Alt...Venus and Jupiter together tonight.

                                [?]Project Gutenberg » 🌐
                                @gutenberg_org@mastodon.social

                                Anatomy of a Galileo Forgery

                                It was hailed as a historic discovery—until a trail of clues revealed one of the rare-book world’s most audacious scams.

                                By: Matthew Wills

                                daily.jstor.org/anatomy-of-a-g

                                Books by Galileo Galilei at PG:
                                gutenberg.org/ebooks/author/39

                                Title page of Sidereus nuncius, 1610, by Galileo Galilei (1564-1642). The original Latin title page of Galileo Galilei's landmark astronomical work, announcing observations of the Moon, fixed stars, the Milky Way, and four Jupiter moons named "Medicea Sidera." Published by Thomas Baglioni in Venice (MDCX), with an ornate engraved publisher's vignette of an enthroned figure below the text. https://en.wikipedia.org/wiki/Sidereus_Nuncius#/media/File:Houghton_IC6.G1333.610sa_-_Sidereus_nuncius.jpg

                                Alt...Title page of Sidereus nuncius, 1610, by Galileo Galilei (1564-1642). The original Latin title page of Galileo Galilei's landmark astronomical work, announcing observations of the Moon, fixed stars, the Milky Way, and four Jupiter moons named "Medicea Sidera." Published by Thomas Baglioni in Venice (MDCX), with an ornate engraved publisher's vignette of an enthroned figure below the text. https://en.wikipedia.org/wiki/Sidereus_Nuncius#/media/File:Houghton_IC6.G1333.610sa_-_Sidereus_nuncius.jpg

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