(Continued from previous message)

the ultrasensitive LISA gravitational-wave detector gets built, this
object could be the first thing it sees.

At the American Astronomical Society meeting now under way in Minneapolis,
Tod Strohmayer (NASA/Goddard Space Flight Center) reported on periodic
X-ray pulsations from a source known as RX J0806.3+1527. The pulsations,
found with the Chandra X-Ray Observatory, agree with earlier,
visible-light observations indicating that the source is a pair of
white-dwarf stars orbiting each other in a tight binary system. The two
collapsed stars are separated by only 80,000 kilometers (50,000 miles, or
one-fifth the Earth-Moon distance) and circle each other every 5.36
minutes. No known binary star has a shorter orbital period...

> http://SkyandTelescope.com/news/article_1521_1.asp

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HIGHLIGHTS OF THIS WEEK'S SKY

* New Moon on Monday, June 6th.
* A very thin crescent Moon shines near Venus on June 7th and 8th.
* Jupiter (magnitude -2.2, in Virgo) glares high in the south to southwest
during evening -- the brightest "star" in the sky.
* Comet Tempel 1 -- which NASA's Deep Impact mission will blast with a
projectile on the night of July 3rd -- is currently glowing at about
magnitude 10.3 in the evening sky, a little fainter than predicted. Find
it near Delta Virginis using the chart in the June SKY & TELESCOPE, page
68.

> http://SkyandTelescope.com/observing/ataglance

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SCHOOL'S ALMOST OUT! (Advertisement)

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There Once Was a Sky Full of Stars
by Bob Crelin, illustrated by Amie Ziner
> http://SkyandTelescope.com/campaigns.asp?id=369

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by Stephen M. Pompea
> http://SkyandTelescope.com/campaigns.asp?id=395

Cosmic Decoders
> http://SkyandTelescope.com/campaigns.asp?id=396

Night Sky Monopoly
> http://SkyandTelescope.com/campaigns.asp?id=397

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Copyright 2005 Sky Publishing Corp. S&T's Weekly News Bulletin is provided
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