Binoculars reveal that Epsilon Lyrae is a double star – two stars in one. A telescope shows that each component star is also a double. The double double star!
A new study – based on supercomputer simulations – reveals that each one of us may be made in part from matter that passes from one galaxy to another.
This image shows M81 (bottom right) and M82 (upper left), a pair of nearby galaxies where “intergalactic transfer” may be happening. Gas ejected by supernova explosions in M82 can travel through space and eventually contribute to the growth of M81. (Credit: Fred Herrmann, 2014, http://cs.astronomy.com/asy/m/galaxies/489483.aspx)
This past winter, Arctic sea ice extent sank to a record low for the 3rd straight year. Now, NASA is looking at the summer melt season’s impact on the Arctic’s oldest, thickest sea ice.
One of the dozen supraglacial lakes that Operation IceBridge surveyed to measure lake depth on July 19, 2017. Image via NASA/John Sonntag.
Live launch coverage from Kazakhstan begins at 10:45 a.m. EDT (14:45 UTC). You can also watch the spacecraft dock with the ISS, starting at 5:15 p.m. EDT (21:15 UTC).
Expedition 52 flight engineers Paolo Nespoli of ESA, left, Sergey Ryazanskiy of Roscosmos, and Randy Bresnik of NASA pose for a photograph outside the Soyuz simulator. Image via NASA/ Bill Ingalls.