As far as I've known, sea tides are higher on a Full moon day. And that is due to the "gravitational pull" of the moon. But we know that moon is visible because of reflection of sun's rays. So, eve…
Chang-E vient d'envoyer un tir après avoir atterri sur la face cachée de la lune. Cela semble délicat, comment un appareil peut-il envoyer des informations depuis un endroit orienté à l'opposé de la Terre ?
Recent photometry suggests that Betelgeuse has been dimming over the past three or so months, reaching the faintest V-band magnitude seen in modern observations. The changes are apparently even vis…
Let's say we have already a base on an exoplanet (like Proxima B). Would it be possible to send information from that base to the earth with todays technology? Not to talk about communication with…
We know that a planet is formed from the nebula of gas and dust. Gravity pulls the particles together in a core. So we all know that the gas cloud is a cloud of hydrogen. But how did water form?…
J'ai beaucoup entendu parler du décalage rouge et cela semble assez légitime. Mais cela donnait l'impression que le passage au bleu était beaucoup moins probable. Quelqu'un peut m'aider?
