The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say.

NASA's Advanced Composite Solar Sail System (ACS3) will be visible from the ground. Find out when you can see it on the NASA app on a mobile device. Credit: NASA/JPL-Caltech ...

The map, spanning 4,000 light-years from the sun in all directions, combines a chart of space dust with the effects of a rare type of young, hot star.

An international team of scientists has unveiled the Flagship 2 galaxy mock-up. No, it's not a cardboard diorama for a school ...