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Welcome to the Door Peninsula Astronomical Society


Promoting the science and public education of astronomy, encouraging observational participation in astronomy, and providing outreach for the Leif Everson Observatory.
Located in Sturgeon Bay, Wisconsin, the Door Peninsula Astronomical Society is a local club and a chapter of the Astronomical League. DPAS is a member of the International Dark Sky Association as well as the Night Sky Network, a teaching arm of the Astronomical Society of the Pacific.

DPAS meets monthly on the first Tuesday of the month at the Ray and Ruthie Stonecipher Astronomy Center. From Highway 42/57, turn East on Utah Street to Cove Road (stop sign) and turn left through the gate. Click here for a map.

DPAS operates and maintains the Leif Everson Observatory. This is equipped with a 14” Schmidt-Cassegrain Telescope on a state-of-the-art robotic mount, a weather station and a budding project in radio astronomy. On a portable mount is a 102mm refractor with a hydrogen alpha filter for studying details of activity on the sun.

The Star Garden at the observatory is used for viewing the sky with unaided vision, binoculars and members’ telescopes. There are also binocular mounts set in concrete which allow people of various heights to share the same view.

Click here to download a membership form to become a member of the DPAS.

Have a look at Sirius
DPAS Newsrstoneci writes "Widely known as the “Dog Star” as the leading light of Canis Major, the big dog, Sirius is the brightest star in the night sky. Its name is from the Greek for “searing” or “scorching”. It shines high in the southeast after dark on January and February evenings from its distance of 8.6 light –years. Intrinsically 26 times brighter than the Sun, Sirius is about twice the Sun’s size.

Though its companion is invisible to the unaided eye, Sirius is actually a binary star. January marks the 150th anniversary of the discovery of Sirius B by Alvin Graham Clark. The two stars in this binary pair orbit extremely close to each other – both fit inside our solar system.

Smaller and just 1/10,000th as bright as its partner , Sirius B is a white dwarf, the burnt-out remnant of a Sun-like star. This cinder has about the same mass as the Sun packed into a volume the size of the Earth. Sirius B is one of the heaviest known white dwarfs. A piece of it the size of sugar cube would weigh more than a ton.

From Star Date (January-February 2012) "
Posted by webmaster on Thursday, January 05 @ 11:31:36 EST (6 reads)
(Read More... | Score: 0)



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