Episode 269 - Questions XIII: https://t.co/p20INBk7jX Our final batch of questions for this century. Pic: Augustus. Does his dynasty compare favourably to the Komnenoi?
Mission success! Electron has successfully deployed 2 TROPICS satellites to orbit for @NASA. This constellation aims to improve forecasting of devastating tropical storms and save lives. Weโre immensely proud to be part of making that possible. One down, one to go!
Marsโ moons are both very small. Deimos is so small and has such low gravity that if you stood on its surface and jumped you could achieve escape velocity and leave the moon forever. (via @exploreplanets)
Uranus orbits the Sun on its side, with its poles alternating pointing toward and away from the Sun. This may be because another large world crashed into the planet long ago, or perhaps because a previous ring system caused Uranus to wobble and tip over. (via @exploreplanets)
Because asteroid Ryuguโs gravity is so weak, the rovers deployed onto its surface by the Hayabusa2 spacecraft hopped instead of rolling. A single hop generated by an internal mechanism could carry a rover up to 15 meters (50 feet), taking 15 minutes to land. (via @exploreplanets)
Most Martian clouds are made of water ice, but at higher altitudes temperatures are low enough that carbon dioxide in the atmosphere freezes, forming clouds made of dry ice. (via @exploreplanets)
1/12) On 13 December 115 AD the city of Antioch (near modern Antakya, Turkey) was struck by a huge earthquake while the emperor Trajan was wintering there with his troops. Dio provides a powerful and *harrowing* account of the devastation:
Episode 259 - The Fourth Crusade (Part 1): https://t.co/gs07WA33k3 Pope Innocent calls for a new Crusade to retake Jerusalem but the mission goes awry and ends up at Constantinople. Pic: Dandolo brings the plan for the Fourth Crusade to the people of Venice (by Gustave Dore)