Credit: NASA/SDO

Big Sunspot Group Heats Up

(Update: The aurora’s active tonight. Not a big storm, but if you live in the northern U.S. and the sky’s clear, head out for a look. A G1 storm (Kp=5) is underway with arcs and faint rays low in the northern sky. The activity, spawned by a coronal mass ejection (CME) from the sun earlier…
Read More

Mars Moon Saturn Antares May 21_2016_S_FEA

Mars Diamond, What A Sight! / That Giant Sunspot

Last night late, the Full Moon, Mars, Saturn and Antares aligned in a diamond over my front yard. I’ll bet you saw it, too. The figure measured 12° wide and 9° deep and made walking the dog more illuminating than usual. The diamond was a one-night-only affair as the moon is never still. Tonight, you’ll…
Read More

Sunspot #2546 rounds the sun's eastern limb bigger than Earth in this photo taken earlier today by NASA's Solar Dynamics Observatory. Credit: NASA

Cyclopean Sunspot Rolls Into View

In ancient Greek mythology, a Cyclops was a member of an ancient race of giants, each with only a single in the middle of his forehead. A new large sunspot feels like the return of this ancient strain as it rounds the limb and comes into clear view this week. I spotted it – excuse the pun – today…
Read More

Sun SDO April 18

Big Sunspot Bows Out With A Bang

Giant sunspot 2529 has provided a lot of entertainment this past week for solar observers. Several times the diameter of the Earth, the sunspot was easily visible through a #14 welder’s glass and a stunning sight through even the smallest telescopes. Most beginners think of telescopes as night sky instruments only, but they’re just as…
Read More

Sun SDO closeup

Sun Sports A Big Black Spot, Leaky Hole

A very distinguished sunspot blackens the sun today. It’s more than twice the size of Earth and plainly visible to the naked eye as a small, dark dot through a safe solar filter such as a #14 welder’s glass. The spot is the “leader” in a small group of sunspots called Region 2529. Sunspots are…
Read More