1.6K views · 49 reactions | How can we determine what a planet’s atmosphere is made out of without taking a sample of it? Spectrographs on telescopes break down starlight, allowing us to identify the specific gasses in a planet's atmosphere by studying their spectral lines.  #Telescopes #Atmosphere #Starlight | Museum of Science, Boston | Facebook

203K views · 3.3K reactions | Atmospheres of the Solar System - Why...

GAIA • Stellar Motion for the Next 1.6 Million Years 13.12.2020 • The stars are constantly moving across the sky. Known as proper motion, this motion is imperceptible to the unaided eye but is being measured with increasing precision by Gaia. This animation shows the proper motions of 40 000 stars, all located within 100 parsecs (326 light years) of the Solar System. The animation begins with the stars in their current positions; the brightness of each dot representing the brightness of the star