EarthSky News - March 21 - Seven Earth-Sized Worlds? What We Really See

March 21 Seven Earth-Sized Worlds? by:

7 Earth-sized worlds? What we really see   A reality check from astronomer Brian Koberlein on what we actually see of the 7 recently discovered Earth-sized planets orbiting the star TRAPPIST-1. Watch the sun's shift on your horizon Starting on this day after a March equinox, note the shift of the sunrise or sunset on your horizon each day, as spring moves toward summer (or autumn towards winter). Tonight … Arcturus, a northern springtime star Orange Arcturus is the constellation Bootes the Herdsman's brightest star. Look for it in the east around nightfall. How a Venus flytrap knows to snap shut Cool video, especially if you've never seen a Venus flytrap in action.

Order your EarthSky Planisphere today! A planisphere is virtually indispensable for beginning stargazers. Your support means the world to us.

Tonight … Arcturus, a northern springtime star Follow an imaginary arc from the Big Dipper's handle to the stars Arcturus and Spica. Throughout 2017, the dazzling planet Jupiter beams close to Spica.

It looked like the sun set twice A lone, small, very brightly illuminated passing cloud - at the exact point where the sun was going down - caused the illusion of a double sunset. Photos and story by Peter Lowenstein. Submit your photo to EarthSky here!

by: