Mercury joins the night sky to complete a seven-planet alignment just after sunset for the end of February. Saturn leaves our ...

Mercury takes only 88 Earth days to orbit the sun.

Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye all February long — with two other planets also detectable for skywatchers ...

Astronomers mistook a car SpaceX blasted into space years ago as an asteroid. The brief mix-up highlights the sometimes ...

Stargazers will be treated to a dazzling six- and seven-planet "alignments" in February. A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

then the difference in this path can be traced out and allows you to measure the eccentricity of the orbit and determine its perihelion as well." All solar system planets have fairly circular ...

Space agencies have systems in place to spot, track, and forecast the future orbits of potentially hazardous asteroids.

The world's space agencies are keeping close watch on an asteroid heading our way, because there's currently a 1 in 83 chance ...