Meteorites delivered water ice to asteroids in early solar system
Planetary scientists have discovered pieces of opal in a meteorite found in Antarctica, a result that demonstrates that meteorites delivered water ice to asteroids early in the history of the solar system. Opal, familiar on Earth as a precious stone used in jewellery, is made up of silica (the major component of sand) with up to 30 percent water in its structure.
Hubble confirms new dark spot on Neptune
New images captured by the NASA/ESA Hubble Space Telescope (HST) confirm the presence of a dark vortex roughly 3,000 miles (4,800 kilometres) across in the atmosphere of Neptune. Though similar features were seen during the Voyager 2 flyby of Neptune in 1989 and by the HST in 1994, this vortex is the first one observed on Neptune in the 21st century.
Hubble portrait captures changes in Jupiter’s Great Red Spot
Scientists using the NASA/ESA Hubble Space Telescope have produced new maps of Jupiter that show the continuing changes in its famous Great Red Spot. The images also reveal a rare wave structure in the planet’s atmosphere that has not been seen for decades. This is the first in a series of annual portraits of the solar system’s outer planets which will help researchers study how they change over time.