Nov
13
Tue
Total Solar Eclipse
Nov 13 @ 12:37 pm – 5:45 pm

For this eclipse totality will be visible from northern Australia and the southern Pacific Ocean.

http://en.wikipedia.org/wiki/Solar_eclipse_of_November_13,_2012

The most populous city to experience totality will be Cairns, which will experience 2 minutes of totality just an hour after daybreak (6:38 am AEST) with the sun at an altitude of just 14°. Norfolk Island, a small pacific island west of Australia, will experience a partial eclipse with a maximum of 98% of the sun obscured at 9:37 am NFT and an altitude of 42°.

Parts of northern New Zealand including Auckland will experience a partial eclipse with over 80% of the sun obscured. Christchurch and points north will see at least 60% of the sun obscured. Maximum eclipse over New Zealand will occur around 10:30 AM NZDT (21:30 UTC).

Parts of central Chile, specifically the Los Ríos and Los Lagos regions from Valdivia (63% obscured) south to Quellón (54% obscured) will see a partial eclipse with over half the sun obscured at sunset, over the coast. Points north up to about Santiago will see the eclipse begin as the sun is setting.

âš« New Moon
Nov 13 @ 3:08 pm – 4:08 pm
Nov
28
Wed
Penumbral Lunar Eclipse
Nov 28 @ 5:14 am – 9:50 am
⚪ Full Moon
Nov 28 @ 7:46 am – 8:46 am
Dec
10
Mon
Monthly Meeting @ GMU Research Hall Room 163
Dec 10 @ 12:00 am – 2:00 am

Sunday December 9, 2012 7:00 pm to 9:00 pm
Guest Speaker: Astronaut Tom Jones

Dr. Thomas D. Jones is a scientist, author, pilot, and former NASA astronaut. He holds a doctorate in planetary sciences from the University of Arizona, and in more than eleven years with NASA, flew on four space shuttle missions to Earth orbit. On his last flight, Dr. Jones led three spacewalks to install the centerpiece of the International Space Station, the American Destiny laboratory. He has spent fifty-three days working and living in space.

Dr. Jones will speak on the Science of Planetology.

Dec
13
Thu
Geminids Meteor Shower
Dec 13 all-day

Geminids
The final major meteor shower of every year (unless one surprises us!) is always the December Geminid shower, often producing 50 or more meteors per hour. It is a beloved shower, because, as a general rule, it’s either the August Perseids or the December Geminids that give us the most prolific display of the year. Best of all, the new moon guarantees a dark sky on the peak night of the Geminid shower (mid-evening December 13 until dawn December 14). But the nights on either side of the peak date should be good as well. Unlike many meteor showers, you can start watching the Geminids by 9 or 10 p.m. local time. The peak might be around 2 a.m. local time on these nights, because that’s when the shower’s radiant point is highest in the sky as seen around the world. With no moon to ruin the show, 2012 presents a most favorable year for watching the grand finale of the meteor showers. Best viewing of the Geminids will probably be from about 1 a.m. to 3 a.m. on December 14.

âš« New Moon
Dec 13 @ 1:42 am – 2:42 am
Dec
28
Fri
⚪ Full Moon
Dec 28 @ 3:21 am – 4:21 am
Jan
11
Fri
âš« New Moon
Jan 11 @ 12:44 pm – 1:44 pm
Jan
14
Mon
Monthly Meeting @ George Mason University
Jan 14 @ 12:00 am – 2:00 am

Our next speaker is Gideon Bass and he will be speaking on Kepler Studies of Low-Mass Eclipsing

Summary of Upcoming Lecture

KIC 6131659 is a long-period (17.5 days) eclipsing binary discovered by the Kepler mission.  We analyzed six quarters of Kepler data along with supporting ground-based photometric and spectroscopic data to obtain accurate values for the mass and radius of both stars, namely M1=0.922 ± 0.007Msun, R1=0.8800 ± 0.0028Rsun, and M2=0.685 ± 0.005Msun, R2=0.6395 ± 0.0061Rsun.  There is a well-known issue with low mass (M <<0.8Msun) stars (in cases where the mass and radius measurement uncertainties are smaller than two or three percent) where the measured radii are almost always 5 to 15 percent larger than expected from evolutionary models, i.e. the measured radii are all above the model isochrones in a mass-radius plane.  In contrast, the two stars in KIC 6131659 were found to sit on the same theoretical isochrone in the mass-radius plane.  Until recently, all of the well-studied eclipsing binaries with low-mass stars had periods less than about three days.  The stars in such systems may have been inflated by high levels of stellar activity induced by tidal effects in these close binaries.  KIC 6131659 shows essentially no evidence of enhanced stellar activity, and our measurements support the hypothesis that the unusual mass-radius relationship observed in most low-mass stars is influenced by strong magnetic activity created by the rapid rotation of the stars in tidally-locked, short-period systems.  Finally, using short cadence data, we show that KIC 6131657 has one of the smallest measured non-zero eccentricities of a binary with two main sequence stars, where e cos ω = (4.57 ± 0.02) × 10-5.