A new study indicates Jupiter’s Great Red Spot is drifting westward faster than before and extending upward, but analysis of historical data confirms it is shrinking overall and now is just slightly larger than Earth.
New high precision spectrometers are expected to help ground-based telescopes detect the presence of Earth-size planets orbiting other stars by measuring subtle changes in starlight caused by the gravitational tugs of orbiting exoplanets.
NASA’s Juno spacecraft has found Jupiter’s cloud belts and zones extend down some 3,000 kilometres and contain about 1 percent of the planet’s mass. Below that, the world seems to rotate as a nearly rigid body.
Proxima b, the nearest exoplanet to Earth, was blasted by a tremendous solar flare last March, an outburst that bathed the world in 4,000 times the amount of radiation Earth receives from a major flare.