Skip to main content

Active forum topics

Support the AAVSO

Become a Member

Make a Donation

Donate with PayPal

Adopt a Variable Star

Donate when you
Shop at Amazon.com

AAVSO transform campaign – participate and win $500

2017 Annual Campaign Donate Today!

Solar Eclipse - August 21, 2017

Learning Opportunities from the AAVSO

2017 Spring Meeting Registration Open!!

Pick a Star

Type star name then click action.
Recent Activity
 
 

Variable Star Observations in Database:

33,172,380 and Counting ...
Last Observation Received:

44 sec ago by SHS - Steven Sharpe (CA)

TX Oph   May 21.1131   10.204V   

Plot TX Oph light curve

 
 

Stellar News Feed

Massive Dying Star Goes Out With a Whimper Instead of a Bang

Now you see it, now you don’t: recording the death or a massive star (and the birth of a black hole), without a supernova explosion!

Read more here

Small telescopes discovered styrofoam-density exoplanet orbiting a bright star

A team from the KELT collaboration have discovered an exoplanet that is highly inflated, so that while it's only a fifth as massive as Jupiter, it is nearly 40 percent larger, making it about as dense as Styrofoam. The planet is orbiting the V = 8 Subgiant HD 93396 in the southern hemisphere.

Read more here

New multi-wavelength images of the Crab Nebula

Optical, x-ray and radio images combined, created a gorgeous montage of this bright Supernova which was first observed by Chinese astronomers in 1054.

Read more here

Safe Sunspot Observing

A great article by our President, Kristine Larsen, on safe observing of the Sun.

Read more here

Colliding stars will light up the night sky in 2022

In 2022, a pair of stars will merge and explode, becoming one of the brightest objects in the sky for a short period. The relevant peer-reviewed paper appeared on arXiv last week (https://arxiv.org/abs/1704.05502).

AAVSO is an equal opportunity and discrimination/harassment-free environment. Please read our policies here.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484