It was the first meteorite in the Egyptian record. Years after the event, scientists concluded through various tests that it came all the way from Mars.
Scientists aboard an aircraft caught the impressive streak and final breakup of the Orbital ATK Cygnus supply ship, as it re-entered Earth's atmosphere on June 22.
Voyager 2 in 1989 - and Hubble Space Telescope in 1994 - saw similar features. But this dark spot, or vortex, is the first seen on Neptune in the 21st century.
Imagine seeing 2 suns in your sky. Like the fictional planet Tatooine in Star Wars, some planets do orbit 2 stars. Kepler-164 is the largest yet discovered.
See the Mars rover Curiosity, nestled on Mars' surface? The sharp-eyed HiRISE camera aboard the Mars Reconnaissance Orbiter caught the view from space.
“That you could have vast liquid water ocean habitats so far from the sun on Pluto - and on other Kuiper belt objects as well - is absolutely incredible.”
Planet K2-33b resides in a solar system in the process of being born. In human terms, if Earth were 45 years old, this planet would be just a few weeks old.