NASA announced the discovery last week and claimed the origin "remains uncertain."
“It’s going to be a treat," said NASA’s Noah Petro.
It's the longest partial eclipse in 580 years and will be a sight to behold, astronomers say.
A solar eclipse, the G-7 summit and a U.S. border crossing round out this week's most stunning images.
A lunar eclipse, a wayward seal and California wildfires round out this week's best images.
A radio telescope in Puerto Rico is completely destroyed after collapsing. The 900-ton receiver platform plummeted more than 400 feet, crashing onto the reflector dish below.
Captured by the GREGOR telescope in Spain, the high-resolution pictures offer a new glimpse at the sun's magnetic field.
Captured "mini moons" have long been theorized. This is just the second one that's been spotted.
A neighboring star is showing some unusual activity and that could mean it's about to blow.