A team of astronomers from Princeton University and the Institute for Advanced Study has identified what appears to be a new ...

It is "rocket science," even when it comes down to high school-level physics. This week's lesson: Force equals mass times acceleration.

A comet hurtling through the solar system from interstellar space is exactly what it appears to be, NASA officials said Wednesday, moving to quash a wave of online speculation.

For the first time in years, astronomers are seriously talking about adding a new member to the solar system’s planetary ...