Variable Stars
Messier 5 (M5) – The NGC 5904 Globular Cluster
In the late 18th century, Charles Messier was busy hunting for comets in the night sky, and noticed several “nebulous”…
Challenge Yourself! See an Astronomical Event that Only Happens Once Every 26 Years
Update: It’s off. This past weekend, the AAVSO issued Special Notice #395 calling off the campaign to observe Alpha Comae…
Astronomy Cast Ep. 337: Photometry
There's a lot you can learn by just staring at an object, watching how it changes in brightness. This is…
Seeing Red: Hunting Herschel’s Garnet Star
Quick, what’s the reddest star visible to the naked eye? Depending on your sky conditions, your answer may well be…
What’s Going On Inside This New Kind of Variable Star?
A new kind of variable star -- 36 of that type, in fact -- has been found in a single…
Weekly SkyWatcher’s Forecast: November 19-25, 2012
Greetings, fellow SkyWatchers! It's going to be a great week to study the Moon - and bright Jupiter is just…
Weekly SkyWatcher’s Forecast: September 24-30, 2012
"Shine on, shine on Harvest Moon... Up in the sky..." Oh! Howdy, fellow SkyWatchers! The seasons are most surely showing…
Weekly SkyWatcher’s Forecast: June 18-24, 2012
Greetings, fellow SkyWatchers! Let's begin the week with some awesome galactic studies and enjoy a meteor shower during Summer Solstice!…
STEREO Looks at the Sun; Finds Planets
[/caption] The primary mission of the twin STEREO probes is to explore the 3-dimensional makeup of our Sun. Each craft…
20 Million Observations by Amateur Astronomers!
[/caption]Early into the celebration of its centennial year, observers of the American Association of Variable Star Observers (AAVSO) passed another…