At west quadrature on February 7, 2016, the red planet appears 90% illuminated as seen through a telescope. Fantastic time to see Mars is just ahead.
You can see all 5 bright planets – Mercury, Venus, Saturn, Mars and Jupiter – together in the sky before dawn, through mid-February.
Finding star distances isn’t easy. Here’s how it’s done, and why astronomers recently modified the distance estimate to the famous star Betelgeuse.
On this episode of EarthSky News, an update on the idea that the early Earth collided with a Mars-sized proto-planet to make the moon. That and more. Join us.
An astrophysicist says our Milky Way may already be dead, but is still going. Why do galaxies stop forming stars, change their shape and fade away?
This is the 110th anniversary of Clyde Tombaugh’s birth. He was a farm boy who loved astronomy and ultimately discovered Pluto. Planets X and Pluto, here.
Low density of comets suggested there might be huge empty caves honeycombed throughout their interiors. Maybe true for some, but not so for Rosetta’s comet.
The asteroid will pass closest to Earth on March 5. Will it pass millions of miles away, or as closely as 11,000 miles (17,000 km)?
It shows a giant jet of particles extending 300,000 light-years, blasting from a black hole at the center of a distant galaxy.
NASA TV will broadcast live coverage of a 5.5-hour spacewalk by two Russian cosmonauts aboard ISS beginning at 7:30 a.m. ET (1230 UTC) Wednesday.