Dr. John Barentine FRASさんのイラストまとめ

JWST is today's Google Doodle.

They made an animated character out of the mirror.

IT'S ADORABLE.

https://t.co/IljqT4I6qn

@EddieLyons3 I call dibs on naming rights.

A friend just brought this interactive website/map to my attention: https://t.co/XOikiTbtMY

Live tracking of major satellite constellations around the Earth. Also shown: SpaceX Starlink ground stations (red dots).

That will be his follow up to the new dinosaur documentary: the Cretaceous-Paleogene extinction, but from the asteroid’s perspective.

“I was minding my business when this planet full of dinosaurs suddenly jumped out in front of me…”

The @NatlParkService website 404 error messages are pretty great.

Some light rain fell in Tucson during the past hour - just enough to wet the pavement. Though it may seem like the early arrival of #Monsoon2021, it is not. Twin low-pressure centers off northern California and over northern Mexico are steering Pacific moisture our way. #wx #azwx

Galileo also understood why Venus showed phases: it demonstrated that the 'heliocentric theory' of the Solar System, advanced almost a century earlier by Nicolaus Copernicus, was right. Venus showed phases because it orbited the Sun and was closer to the Sun than the Earth.

Another sneak peak at the inaugural ("prologue") issue of the Journal of Dark Sky Studies showing some factoids about dark skies around the world. The issue is at the printer today for a run of 6,000 copies. Website coming soon. @UUtah @IDADarkSky