The best opportunity to potentially see all seven planets is coming up on Feb. 28 around 6:10 p.m. ET, according to Shanahan. Mercury, which is the closest planet to the sun, would be the first to be ...

Prior to 2040, the last planetary quintuplet occurred in the year 1186, and according to Uptain, records show that the close ...

The subtle changes in orbit (eccentricity), the planet’s inclination compared to the orbit (obliquity), and the change in the direction of Earth’s rotational axis (precession) were possible ...

Taking advantage of a sophisticated adaptive optics instrument, a team of astronomers at the University of Arizona made observations that reveal unprecedented details of planets when they are very ...