Nov 9 GAAC Program Note

This month we're pleased to have as our speaker Sarah Blunt from the Harvard-Smithsonian Center for Astrophysics. Sarah's presentation is titled "Know thy Star, Know thy Exoplanet."

Sarah's talk is based on the simple fact that nearly every known exoplanet has been discovered indirectly; that is, in order to detect and characterize the planet, we make measurements of its host star.

Because of these relationships, many exoplanet measurements have been limited by our knowledge of their stars at the time the planets were detected. In this talk, Sarah will discuss exoplanet discoveries that have now been made possible by more precise stellar data, and will introduce ongoing stellar research that has the potential to improve our understanding of exoplanets.

There are more planets out there than stars --  hundreds of billions just in the Milky Way alone.

See you there, 8 Vulcan Street in Lanesville, 8:00 pm on the 9th -- lots of good things to eat, lots of fun stuff to know, and great conversations to be had!

October 12 GAAC Meeting Program Note

At our Friday night October 12 GAAC meeting we are pleased to have with us Phil Orbanes, with "Tales from the Cosmic Dark Side," a Halloween-themed presentation illustrated with Phil's excellent astrophotos, touching on all sorts of dark objects -- Dark Nebulae (and Bok Globules), Molecular Clouds,  Integrated Flux Nebula, Dark (“Rogue”) Planets, “Dark Matter” and “Dark Energy.”

Calling on examples from the Pipe nebula through the possible eventual heat-death of the universe, Phil will elucidate the universe of dark phenomena all around us. We'll see you there, 8:00 pm at the Lanesville Community Center, 8 Vulcan St in Lanesville. There will be goodies of every stripe, friends old and new, and just a generally good time to be had for all.

September 14 GAAC Meeting Program Note

At our September 14 meeting we're pleased to have Charles Law, from the Harvard-Smithsonian Center for Astrophysics, with “From Young Stars to Planets: How to Make a Solar System.”

How did the Solar System form? This question has taken on increased significance with the discovery of a vast number of exoplanetary systems in the past two decades. Public and scientific interest in planetary science has also been piqued with NASA’s recent Juno and New Horizons missions to Jupiter and Pluto. Throughout the last decade, radio telescopes have been revealing exciting new results and deepening our knowledge of planet formation.

In an entertaining, colorful and educational presentation, Charles will outline our current understanding of the planet formation process, explore recent observational findings, and briefly touch on questions related to the origins of life and astrochemistry.

You definitely don't want to miss this one -- see you there, at the Lanesville Community Center, 8 Vulcan St, 8:00 - 9:30pm. A map is here.

GAAC July 13 Meeting -- Program Note

Friday night at 8:00pm, July 13, the Gloucester Area Astronomy Club is pleased to host Astronomy Magazine columnist and President of the Amateur Astronomy Makers of Boston, Glenn Chaple, with a presentation titled “Double Stars For Backyard Telescopes — Double Stars are TWICE the Fun!”

In the 19th century and early decades of the 20th, when refractors were the telescopes of choice, double stars were the favorite fare of amateur astronomers. With the discovery in the 1920s that the so-called “spiral nebulae” were actually distant galaxies and the emergence in popularity of the reflecting telescope, double stars took a back seat to deep-sky objects.

Light pollution has made it harder and harder to observe deep-sky objects, but double stars remain relatively unaffected by streetlights or the Moon. As a result, double stars are regaining popularity among backyard astronomers.

In a colorful and informative presentation, Glenn will explain the nature of double and multiple stars, discuss the history of double star astronomy, and offer hints on observing double stars with unaided eye, binoculars, or telescope. He’ll conclude with a look at a Top Ten double star list, the Double Star Marathon, and resources for the double star enthusiast; you’ll come away well-prepared for some double-star observing.

We’ll hope to see you on Friday July 13, from 8:00 to 9:30, for an evening of great snacks, great conversation, and a terrific presentation by a GAAC favorite.

GAAC meets on the second Friday of every month except August, at the Lanesville Community Center, 8 Vulcan Street in Lanesville. A map is here. There are no dues or fees, and the public is warmly invited. No special knowledge or equipment is needed to have a great time.

Friday June 8 is Welcome to Amateur Astronomy Night at GAAC!

Friday night, June 8, at 8:00pm is the Gloucester Area Astronomy Club’s “Welcome to Amateur Astronomy” night! Free, of course.

This annual event is always a GAAC favorite. We’ll be featuring a group of quick, 10-15 minute presentations on topics of interest to anyone interested in pursuing astronomy, as well as a roomful of different binoculars and telescopes to inspect and ask questions about, and all the great conversation and goodies you’ve come to expect at GAAC meetings.

You’ll be able to find out more about what you need to get started, how to do astrophotography, places to shop and how much to spend, what you’ll be able to see, the advantages of different telescope optical designs and brands, and much much more.

If the weather cooperates we can step outside after the meeting and look around a bit with some of the scopes. Jupiter’s up!

You’re invited — see you there!

GAAC members meet at the Lanesville Community Center, 8 Vulcan Street in the Lanesville neighborhood of Gloucester MA, from 8:00 – 9:30pm on the second Friday of every month, for presentations, discussions and activities related to observational astronomy. There is no cost.

May 11 GAAC Program Note

GAAC is fortunate indeed to have Dr. Jonathan McDowell with us this month, at 8:00 pm Friday May 11 at the Lanesville Community Center, speaking on "Space Junk: A Traffic Crisis in Outer Space."

Dr. McDowell is an Astrophysicist with the Chandra X-Ray Observatory at the Harvard-Smithsonian Center for Astrophysics, a mathematician and a programmer. Dr. McDowell maintains one of the world’s best databases of orbital material launched into space – aka space junk.

It's been over 60 years since the launch of the first artificial satellite, Sputnik, and space is getting busier and busier.

There are over 1,500 working satellites up there, but there are also over 18,000 known pieces of orbital debris whizzing around at up to 18,000 miles an hour. At that speed, a collision with even a small piece of junk can ruin your whole day.

Dr. McDowell will talk about the demographics of the satellite population: who is putting satellites up there, what are they doing, what the space junk is, why there's so much of it -- and most important, what can we do about it?

Join us on May 11th for this colorful, engaging and important talk. Come early for great goodies, fun conversation with friends old and new, and really cool and accessible science.

You can subscribe to Dr. McDowell’s monthly space report here:

http://www.planet4589.org/space/jsr/jsr.html

12/8 GAAC Meeting Program Note

GAAC is fortunate to have Sky & Telescope Magazine Senior Editor Kelly Beatty as a speaker for the December 8 Holiday meeting, with a riveting presentation on "The Sputnik Years." Kelly will show us how it all happened, who was involved and what some of the many important historic results of that event have been.

October 4, 1957 marked the beginning of the Space Age, with the launch of Sputnik by the Soviet Union. The satellite sped by over the heads of the world, and the space race was on. Everything that followed, from John Glenn orbiting the planet, to the moon landings, to the Mars rovers, to New Horizons' visit to Pluto, follows from this event.  

Kelly Beatty has been honored twice by the Division for Planetary Sciences (DPS) of the American Astronomical Society. In 2005 he received the Harold Masursky Award for meritorious service, and in 2009 he was honored with the inaugural Jonathan Eberhart Journalism Award. He is also a recipient of the prestigious Astronomical League Award (in 2006) for his contributions to the science of astronomy and the American Geophysical Union's Cowen Award for Sustained Achievement in Science Journalism (2009).

Kelly holds a Bachelors degree in geology from the California Institute of Technology and a Master's degree in science journalism from Boston University. During the 1980s he was among the first Western journalists to gain firsthand access to the Soviet space program. Asteroid 2925 Beatty was named on the occasion of his marriage in 1983, and in 1986 he was chosen one of the 100 semifinalists for NASA's Journalist in Space program.

GAAC Meeting Friday October 20 @8:00 pm

We'll be meeting a week late, but we have a program worth waiting for! Our Oct 20 meeting, at the Lanesville Community Center, will feature Dr. Bill Waller, with a presentation titled "Surfing the Galactic Froth." As it turns out, space is not so empty after all, but instead is shot through with frothy stuff.

According to Dr. Waller, this phenomenon arises mostly from microscopic grains of dust, irradiated and warmed by stars within our Galaxy’s disk, and concentrated in nebular regions of recent star formation and subsequent stellar death.

There's a lot we can learn from these complex emissions, which provide a record of processes that have structured and powered the interstellar medium for the past 100 million years. Some of these features can be described in terms of “filaments,” “loops,” and “shell fragments,” while others appear more random – consistent with turbulence and other processes.

In his usual colorful and irreproducible style, Dr. Waller will consider some of the hot stars, intense stellar winds, and supernova explosions that power the galactic froth, and will present recent images of this nebular emission from three nearby galaxies.