Astronomy (Henry Grieb Observatory, SVAS, Unistellar), Chess, Wikipedia, West Coast Swing Dancing.

Joined September 2009
81 Photos and videos
Kevin Heider retweeted
#MeteorSighting: Eyewitnesses in several U.S. states across the southeast reported a bright fireball on the night of June 14 at 10:26 p.m. CDT. The meteor, which was also captured by three NASA meteor cameras, was first spotted above Tupelo, Mississippi, moving to the northwest at 56,000 mph. It traveled 300 miles before disintegrating above the Mark Twain National Forest in Missouri. The object moved too fast and was too small to produce meteorites. More on this fireball: go.nasa.gov/4gmBAhS Eyewitness accounts supplied by the American Meteor Society
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Kevin Heider retweeted
Motion of the nearby red dwarf star Wolf 359 captured over a 7 yr period. Wolf 359 is a small red dwarf star about 7.9 light-years from Earth, making it one of the Sun’s nearest stellar neighbours. It lies in the constellation Leo and is far too dim to see without a telescope. Its proper motion is unusually high: about 4.7 arc seconds per year, meaning its position shifts noticeably against background stars over just a few years.
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Kevin Heider retweeted
Motion of Barnard’s star over a period of 12 months.
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220P/McNaught outburst as imaged with a #Unistellar telescope on 2 June 2026. Over the last week comet 220P/McNaught has brightened by about 10,000x from mag 18 to mag 8. In the morning sky it is located about 11 degrees to the upper right of Saturn. -- Kevin Heider
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Kevin Heider retweeted
Bright fireball observed by Western University Southern Ontario Meteor Cameras last night at 511am EDT (0911 UT).
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Kevin Heider retweeted
Every day, remarkable things happen overhead: meteors, satellites, drones, atmospheric events, and sometimes phenomena we cannot yet explain. Too often, they are captured as blurry videos with missing context — or not captured at all. @Skymapperspace is launching SkySphere, an AI-powered all-sky observatory designed to continuously monitor and analyze the sky in real time. Built for citizen scientists, educators, researchers, observatories, and skywatchers, #SkySphere combines wide-sky imaging, edge AI, scientific metadata, and cryptographically secured records, enabling events to be detected, documented, and studied with confidence. The SETI Institute is supporting this effort because better sky observations mean better data — for science, education, and discovery. SkySphere is more than a camera. It is a step toward a citizen-powered global network of trusted sky monitoring. Help bring SkySphere to Life on Kickstarter: kickstarter.com/projects/all…
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Comet 10P/Tempel as imaged on the morning of 25 May 2026 with a #Unistellar 114mm smart telescope
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Kevin Heider retweeted
We've suddenly encountered a dense clustering of near Earth asteroids, getting as close as 0.1 lunar distances. This is a shared jet stream which on cosmic scales allows for elastic-free collisions and condensation. It's quite normal, and these would burn up in our atmosphere
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Kevin Heider retweeted
Spiralling global temperatures (1850-2026) It is exactly 10 years since I first put this animated graphic of changes in global temperature online. #ClimateSpiral It instantly went viral. People watched it over and over again. It still offers the power to shock a decade on.
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Kevin Heider retweeted
Light May Snow falling this morning around Big Bear with the eagles enjoying it! Snow levels currently are near 6500ft. #CAwx #Snow #BigBear #SoCal #Eagle
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Kevin Heider retweeted
Replying to @Unistellar
#SN2026ewd is again of the Type Ia. This exploded #WhiteDwarf shines at 14.9 mag in galaxy #UGC11508, which is located in the constellation of Cygnus.
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Large 10km comet to approach Earth in August :) en.wikipedia.org/wiki/10P/Te…
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Kevin Heider retweeted
今朝のC/2025 R3です。 今日は趣を変えて、全天カメラから西の空を切り出しました。 2026-05-01T23:16:29Z- site : Observatorio El Sauce(Obstech)
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Kevin Heider retweeted
A rocket booster will slam into the Moon on August 5. 2025-010D is the upper stage of a Falcon 9 rocket that brought the Blue Ghost Mission 1 to the Moon.
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Kevin Heider retweeted
今朝のC/2025 R3です。 今日は、お隣のPlaneWaveも稼働中の様で助かりました。 2026-04-30T23:29:50Z- 30sec x10 SIGMA ART 105mm F1.4 ASI2600MC MX-HD site : Observatorio El Sauce(Obstech)
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Kevin Heider retweeted
Ever seen a piece of 1960s space hardware still haunting Earth's neighborhood decades later? 🚀 This NASA JPL animation shows J002E3 - the spent S-IVB third stage from Apollo 12's Saturn V (launched November 1969). In 2002, amateur astronomer Bill Yeung spotted it and logged it as a near-Earth asteroid. Turned out to be a 33-year-old rocket stage. Watch the cyan path trace its journey from May 23, 2002 to June 17, 2003. It drifts in from the left, loops and twists around Earth and the Moon in wild, non-repeating arcs, threading past the L1 point - the gravitational gateway between Earth's and the Sun's sphere of influence - while the Moon tugs it back and forth in a chaotic, unpredictable dance. No neat ellipses. No tidy repeating orbits. Just a 50-year-old rocket stage being slowly torn between three gravitational masters. No trajectory predictor in 1969 could have told you where this thing would be in 2002. Chaos saw to that. 🧵 Part 2: the full orbital mechanics breakdown ↓
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Kevin Heider retweeted
Comet 88P/Howell 2026 Apr. 29.42 UT m1=10.0: (m2=13.6) Dia.=&5.5' Tail=&26.5' in PA 246 deg... [T75] 0.25-m f/3.8 Newtonian reflector CMOS... T. Prystavski (iTelescope observatory, X07 (remotely from Rio Hurtado Valley, Chile)) [morning twilight: Sun alt. -16 deg.]
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Kevin Heider retweeted
Captured this with my telescope in 30 minutes last night from my back yard in Los Angeles using the Unistellar EVscope . This supernova is in a galaxy 50 million light years away. So the light you’re seeing is from 50 million years ago!
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Kevin Heider retweeted
Comet 123P/West-Hartley 2026 Apr. 06.16 UT m1=17.6 ... [T26] 0.51-m f/3.0 Cassegrain CMOS... T. Prystavski... iTelescope observatory, U94 (remotely from Great Basin Desert, Beryl Junction, Utah, USA)
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Kevin Heider retweeted
The comet C/2025 R3 (PANSTARRS) is now also in the field of view of the coronagraph CCOR-1: ccor.nrl.navy.mil/ccor_realt… = the latest image (the one here is from 14:00 UTC), ccor.nrl.navy.mil/realtime-m… = an animation up to now (and see soho.nascom.nasa.gov/data/re… for the LASCO C3 view).
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