Daniel Machacek
Space nerd, Image processor,
Lazy photographer,
Humanist
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- Hard to explain how much I love this grainy, long-exposure image from the Perseverance rover showing Deimos in the pre-dawn sky. Just hours before it was taken, I was also out in the cold, taking pictures of the sky, one planet away. Perseverance saw the very same constellations that I did.
- How amazing is that? Perseverance, from her vantage viewpoint at Witch Hazel Hill, before sunrise, captures Mars' moon Deimos, in stellar company of Regulus and Algieba in constellation Leo. And we get a nightly view of "Woodstock Crater", at center right. www.jpl.nasa.gov/images/pia26... #Mars 🧪🔭
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- Tethys, moon of Saturn, from Voyager 2 on August 25, 1981. The giant crater Odysseus can be seen on the terminator.
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- #JAXA develops satellite system to quickly assess quake damage | Via The #AsahiShimbun Asia & Japan Watch www.asahi.com/ajw/articles...
- Mount Vesuvius as seen by Sentinel-2 in Dec. 2023. Visible light and SWIR.
- Image taken on May 1, 2025.
- It will never not blow my mind that we can take pictures of the SURFACE OF ANOTHER PLANET and only a *few hours later* see them on our phones like this one, taken earlier today
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- #Venus Vast, quasi-circular features on Venus’ surface may reveal that the planet has ongoing tectonics, according to new research based on data gathered more than 30 years ago by NASA’s Magellan mission. 🧪🔭 www.jpl.nasa.gov/news/nasas-m...
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- #Voyager Engineers at NASA’s Jet Propulsion Laboratory in Southern California have revived a set of thrusters aboard the Voyager 1 spacecraft that had been considered inoperable since 2004. www.jpl.nasa.gov/news/nasas-v... 🧪🔭
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- The unmistakeable beauty of a living world seen from space. Seagrass and sand pattern on Great Bahama Bank, imaged by Landsat 8 on February 15, 2020. 🧪
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- Keeping to yesterday's Saturn V S-IVB rocket stage theme - a little-known 1963 study looked at using the S-IVB stage to enable radio communication with Apollo expeditions to the Moon's hidden Farside hemisphere. From No Shortage of Dreams. 🛰️🔭🧪🚀🪐🌏🌖👩🚀 spaceflighthistory.blogspot.com/2016/10/talk...
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- A new preprint introduces a new candidate for #Planet9 according to a #Taiwanese team: t.co/tzzy6h9kVt It emphasizes the intrinsecal difficulty to reconstruct the orbit of extremely distant and eccentric planets. Tony Dunn nicely compares its orbit with Brown's candidate & Sedna #PlanetarySciences
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- Etna volcano in Sicily. SAR image taken by Sentinel-1 on Jan. 19, 2025.
- SAR view of Kilauea caldera in Hawaii. Images taken by Sentinel-1 since December 2024 show rising level of lava and growing of volcanic cones at the western caldera wall.
- Sentinel-2 closeup view of rising lava level.
- Hot-off-the-press from NASA #astro #planetsci 🔭! Evidence for convective methane clouds in the northern lake region of Saturn’s moon Titan by #JWST and #KeckObservatory!
- NEW: Saturn’s moon Titan has weather similar to Earth’s, but driven by methane evaporation and condensation. Astronomers have found evidence for clouds bubbling up over Titan’s northern hemisphere for the first time, using #NASAWebb and Keck observatory: webbtelescope.pub/3GofvQ1 🔭 🧪
- And the new version of Europelta is almost ready, texture details are missing and here are the first renders Any opinion? #paleoart
- And after a little work it is ready to begin the next phase of sculpting and baking to begin texturing!! #Paleoart
- NEW: Saturn’s moon Titan has weather similar to Earth’s, but driven by methane evaporation and condensation. Astronomers have found evidence for clouds bubbling up over Titan’s northern hemisphere for the first time, using #NASAWebb and Keck observatory: webbtelescope.pub/3GofvQ1 🔭 🧪
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- Some storm clouds over Belarus. Image taken by Sentinel-2. I don't remember the exact date, it was the summer of 2023 or 2024.
- If it's the 14th of the month, it's time for the #ESAJuice bar! The animation below shows Juice's altitude transition from 500 km to 200 km above Ganymede, an update announced earlier this year. The new phase of 30 days at 200 km will enable a more detailed investigation of Jupiter's moon. 🔭
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- Saturn from the approaching Voyager 2 on August 23, 1981. This image utilizes a methane filter for the red channel, which is closer to true red than the orange filter usually used for Voyager red (it was largely red-blind). This set really brought out atmospheric detail.
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- This animation the #wildfires in #Saskatchewan, Canada show the shocking amount of smoke and other pollutants.💨 Very long and thick smoke plumes moving northeast. Many hotspots also detected.🔴🔥 🛰 @eumetsat.int Processed in @zoom.earth 👨🔬 @mparrington.bsky.social
