Category: reblog

humanoidhistory: The rings of Saturn, observe…

humanoidhistory:

The rings of Saturn, observed by the Cassini space probe on May 3, 2005.

(NASA)

humanoidhistory: The rings of Saturn, observe…

humanoidhistory:

The rings of Saturn, observed by the Cassini space probe on May 3, 2005.

(NASA)

nemfrog: Star magnitudes. An introduction to …

nemfrog:

Star magnitudes. An introduction to astronomy. 1868.  Internet Archive

nemfrog: Star magnitudes. An introduction to …

nemfrog:

Star magnitudes. An introduction to astronomy. 1868.  Internet Archive

nemfrog: Planets compared in size to the sun….

nemfrog:

Planets compared in size to the sun. Elementary Science by Grades, Book Six. 1920

nemfrog: Planets compared in size to the sun….

nemfrog:

Planets compared in size to the sun. Elementary Science by Grades, Book Six. 1920

Regular

theladyscientist:

barcarole: Ghalib, from Mirza Ghalib: Selecte…

barcarole:

Ghalib, from Mirza Ghalib: Selected Lyrics and Letters (trans. K.C. Kanda)

spaceplasma: The Sun released this weak non-E…

spaceplasma:

The Sun released this weak non-Earth directed coronal mass ejection (CME) on December 24, 2018.

Merry Xmas!

just–space:

just–space:

The Aurora and the Sunrise : On the International Space Station (ISS), you can only admire an aurora until the sun rises. Then the background Earth becomes too bright. Unfortunately, after sunset, the rapid orbit of the ISS around the Earth means that sunrise is usually less than 47 minutes away. In the featured image, a green aurora is visible below the ISS – and on the horizon to the upper right, while sunrise approaches ominously from the upper left. Watching an aurora from space can be mesmerizing as its changing shape has been compared to a giant green amoeba. Auroras are composed of energetic electrons and protons from the Sun that impact the Earth’s magnetic field and then spiral down toward the Earth so fast that they cause atmospheric atoms and molecules to glow. The ISS orbits at nearly the same height as auroras, many times flying right through an aurora’s thin upper layers, an event that neither harms astronauts nor changes the shape of the aurora. via NASA