In the 1980s, Voyager 2 discovered a dark storm in Neptune's dense atmosphere, and now the Hubble Space Telescope is tracking Neptune's storms. More in this NASA video.
For decades, astronomers have been talking about of galaxies with supermassive black holes at their cores. Now they say they've clearly confirmed a black hole's encircling, dusty, spinning disk of gas.
Global sea level rise has been accelerating in recent decades, rather than increasing steadily, according to a new study based on 25 years of NASA and European satellite data.