Supernova 1987a in the Large Magellanic
Cloud is surrounded by an unusual
ring structure and glowing gas. Credit: Hubble Heritage Team
(AURA/
STScI/
NASA)
AAVSO Alert Notices are published irregularly and alerts those
interested to the discovery of novae, unusual activity of variable stars,
and requests from astronomers for simultaneous AAVSO observations. They
are available from this web site or by e-mail.
