Skip to main content

Active forum topics

VPhot , PinPoint, WCS
AE Ara

Support the AAVSO

 

Solar Eclipse - August 21, 2017

Read more...

Nearly There!!

$7,000 to go donate today!!

Read more...

New & Used Equipment For Sale

Read more...

Annual Meeting 2017 Nashville, TN

Registration now open!!!

Read more...

NEW!! AAVSO Target Tool

Read more...

Pick a Star

Type star name then click action.
Learn More
Recent Activity
 
 

News Archives

Variable Star Observations in Database:

33,479,261 and Counting ...
Last Observation Received:

1 min 15 sec ago by HMB - Franz-Josef Hambsch (BE)

WW CRA   Jul 20.1241   11.774V   

Plot WW CRA light curve

 
 

Stellar News Feed

Another Possibility for Tabby’s Star dips

An alternative explanation for Tabby’s star dips: sporadic events blocking stellar flux on the photosphere of the star. Those events can be due to magnetic activity (as with the Sun), differential rotation, sporadic changes in photospheric abundances, or random variations in convective efficiency...

Read more here

Submitted by stellakafka on Wed, 07/12/2017 - 00:59

Flow of material is observed for the first time around a young eruptive star

Every year, about two Earth masses of material flows to the disk of the young star V346 Normae from its surroundings, to eventually end up on the star causing a brightening. The hard-to-see phenomenon was captured by a Hungarian-led research group using ALMA, the largest astronomical telescope on Earth. The observation helps in the understanding of a key phenomenon: how circumstellar disks evolve and ultimately form planets.

Submitted by stellakafka on Wed, 07/05/2017 - 05:22

Blue Large-Amplitude Pulsators (BLAPs) as a new class of variable stars

A new paper published in Nature Astronomy, presents more than a dozen of previously unknown short-period variable stars: blue large-amplitude pulsators (BLAPs).

Read the arXiv paper here (the Nature Astronomy paper can be found here)

Submitted by stellakafka on Fri, 06/30/2017 - 10:57

New pictures of alpha Ori (Betelgeuse)

The highest resolution image of Betelgeuse released by ALMA, reveals the supergiant’s lower chromosphere, giving a glimpse of life below the surface of the star.

Read more here

 

Submitted by stellakafka on Fri, 06/30/2017 - 10:55

A Very Rare Discovery: Failed Star Orbits a Dead Star Every 71 Minutes

Synergy between the rejuvenated Kepler space telescope (K2) and ground-based facilities reveal the properties of a rare cataclysmic variable: a brown dwarf orbiting a white dwarf every 71 minutes.

Read more here

Submitted by stellakafka on Mon, 06/12/2017 - 09:41

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