Michael Westさんのイラストまとめ

Happy Birthday, Carl Sagan, born this day in 1934. He's the reason I became an astronomer. #CarlSagan

by Dan Piraro #FlatEarth

Today is National Pluto Demoted Day, which recalls the day in 2006 when the International Astronomical Union took away Pluto’s planet status. But #Pluto will always remain a planet here at #Flagstaff’s Lowell Observatory, where it was discovered! #NationalPlutoDemotedDay

Carpe diem

Curious about cosmology? "Λ CDM Cosmology for Astronomers" by Condon & Matthews is a nice, brief introduction to the mathematics behind the Big Bang. It’s posted on today’s arXiv https://t.co/4gfTfBql1c

Cool! A literal world map: the meaning of each country's name https://t.co/5pDtM1a5mC

Gorgeous image of ripples created by galaxy collisions in today’s Astronomy Picture of the Day https://t.co/bUbUUWBMWI @apod

https://t.co/KZV6UN7glu