Earth’s composition seemingly does not fit into planet formation theory. Ripping apart its building blocks by collisions during accretion might sound violent, but can be a way to go.
A bright spot on Uranus triggered an international push to figure out what exactly was going on. Here is a first look at the bizarre weather patters in the atmosphere of our distance neighbor.
A dry planet and one with a thick atmosphere close together seems to be very weird. How about smashing one with a huge impactor?
Earth’s atmosphere is about 100 times less massive than Venus’ atmosphere. This gave rise to the idea that Earth had a more massive atmosphere, which got then depleted by impacts. This Astrobite discusses what would have been the optimal impactor size.
By combining galaxy formation histories and planet formation models, we can estimate the number of potential civilizations in our Universe.
How and where did the first organic molecules emerge? Sophisticated chemistry models for the synthesis of amino acids within planetesimals can help us to decipher these mysteries.