EarthSkyさんのイラストまとめ

Why stars seem brighter this time of year
https://t.co/UbhSwCY1W0

Day and night sides of Earth at instant of solstice

Dec 22 0448 UTC

Dec 21 10:48 pm CST

https://t.co/ojLtp7WWkR

Karthik Easvur in Pondicherry, India caught this iridescent cloud earlier today.
https://t.co/YPDvIAkjzZ

Milky Way photo with 46 billion pixels ...
https://t.co/5k3VxSdkEt

It's the largest astronomy photo ever

Last night's moon from Ken Christison

Sets before midnight, leaving skies dark for tonight's Orionid meteor shower!

Total eclipse of the moon coming up in September ...
http://t.co/nj7njmYpIK

New Horizons silent during today's flyby
http://t.co/SqtbJOFME2

Artist's concept of Charon-light cast on Pluto.

Explore beautiful Hubble Space Telescope images from each year the telescope has been in orbit
http://t.co/pwuQ8gBuLR

Surprise! Earth's core has a core.
http://t.co/eWkGBMPDci

"Moon illuminated clouds above Truchas Peaks of northern New Mexico ..." Photo: Richard Hasbrouck.