Title: New northern common proper motion pairs Authors: John Greaves (Version, v2) A list of 705 new Northern Celestial Hemisphere common proper motion pairs as derived from the Second U.S. Naval Observatory CCD Astrograph Catalog is presented, along with details of their separation, motion, b...
Title: Supernova 1998S at 14 years Postmortem: Continuing CSM Interaction and Dust Formation Authors: Jon Mauerhan, Nathan Smith We report late-time spectroscopic observations of the Type IIn supernova (SN) 1998S, taken14 years after explosion using the Large Binocular Telescope. The optic...
Wanted: one organist for concert in remote Bolivian jungle accessible only by raft. Must be prepared to face rapids, alligators and 30C (86F) temperatures. Ability to swim a bonus. Church organists are rarely an essential part of expeditions into the Amazonian rainforest, but a team of scientist...
Giovanni Aldini (April 10, 1762 - January 17, 1834), Italian physicist born at Bologna, was a brother of the statesman Count Antonio Aldini (1756-1826) and nephew of Luigi Galvani, whose treaties on muscular electricity he edited with notes in 1791. Read more
Join the AAVSO for half off From now until April 30, 2012 new members can join the AAVSO for half off the usual price of annual dues. Your total cost will be just $40.00. ($30.00 for 2012 dues and a one time $10.00 processing fee. This offer is only for new members. [url=http://www.aavso.org/join-aa...
The familiar model of Atlantic ocean currents that shows a discrete "conveyor belt" of deep, cold water flowing southward from the Labrador Sea is probably all wet. New research led by Duke University and the Woods Hole Oceanographic Institution relied on an armada of sophisticated fl...
The second USS Thresher (SSN-593) was the lead ship of her class of nuclear-powered attack submarines in the United States Navy. Her loss at sea during deep-diving tests in 1963 is often considered a watershed event in the implementation of the rigorous submarine safety program SUBSAFE. Read more...
John Whitehurst FRS (10 April 1713 - 18 February 1788), of Cheshire, England, was a clockmaker and scientist, and made significant early contributions to geology. He was an influential member of the Lunar Society. Read more
SDO and STEREO Spot Something New On the Sun One day in autumn, 2011, Neil Sheeley, a solar scientist at the Naval Research Laboratory in Washington, D.C., did what he always does - look through the daily images of the sun from NASA's Solar Dynamics Observatory (SDO). But on this day he saw something h...
Title: Fast generation of mock maps from realistic catalogues of astrophysical objects Authors: M. De Domenico, H. Lyberis We present a novel method to generate a synthetic distribution of objects (mock) on a spherical surface (i.e. a sky), by using a real distribution. The resulting surrogate m...
A possible bright transient in the constellation Corona Borealis on the 9th April, 2012. Position (J2000): R.A. 15 39 18.8 | Dec. 26° 36' 12.4''Expand (100kb, 400 x 300)
Whether you call them YSOs (Young Stellar Objects) or PMS (Pre-Main Sequence Stars) you'll find everything you wanted to know about them - and probably a few things you didn't - here. The YSO section is the newest of the AAVSO's official observing sections, and so this is the starting point for those o...
The magnitude 17.8 asteroid (4557) Mika will occults the magnitude 2.9 star Delta Capricorni22:30:46 to 22:31:52 UT, 9th April, 2012. The 0.7 second event is visible from souther India and Malaysia Position (J2000): R.A. 21 47 02.6716 | Dec. -16° 07' 41.850''
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