|Photo by Ian Clarke
Monday lab had a good session last night, though a little cold. After a visual tour of the sky (dominated by the almost-full moon), we used a Meade telescope to observe Venus, Jupiter, the Orion Nebula, the Andromeda Galaxy and the moon. A look at the dome room and control room of the observatory building wrapped up the evening. The image on the right, taken at 6:38 PM, shows Jupiter (above), Venus (below), and the observing deck illuminated by moonlight. Look for Venus and Jupiter to draw closer together over the next few weeks, eventually passing about three degrees from each other on March 12.
The spring schedule is up on the website, or it can be accessed directly as a Google calendar here http://goo.gl/UEZbj
A couple notes about the schedule. Classes at the College did not start until Jan 23, so we will be doing the new year show the last Sunday and Monday of January. That works out well with our February sky show, which will be a week later than usual to avoid the superbowl. Other than that, it’s first Sunday at 4 PM and first Monday at noon until May.
If you are interested in a private show for a school or community group, please contact us soon since our spring calendar tends to fill up and we typically do not schedule private shows after April due to the student workers’ busy academic schedules.
You can follow the planetarium on twitter @GCPlanetarium.
We got the CCD cameras out at our second session. Here are photos of M13 (globular cluster) and M27 (planetary nebula):
And finally, another shot of the Int’l Space Station. It’s the short trail; longer trail is an airplane.
| Gettysburg College Observatory image
Our monthly skyshow series returns for the 2011-12 academic year this Sunday, Sept. 11, at 4 PM and Monday at noon. Full calendar is available on the planetarium web site. Topics will be the September skies as well as astronomy news, including the unusual supernova pictured here.
At left is a photo I took of the waning crescent moon and Venus at 6:16 AM on March 1. Upcoming moon-planet meetings include one with Jupiter tonight, visible if the clouds clear in time. In that case, it would be a waxing crescent moon in the west after sunset. Another moon-Venus morning conjunction will occur on March 31, a little lower in the east than the one pictured here.
Hear about these events and more at the Sky this Month shows today at 4:00 and tomorrow at noon.
Our goal is to do the “Sky this Month” shows on the first Sunday and Monday of the month, except where outside factors interfere. Since its move to February, we have learned not to fight the NFL Superbowl. That’s why there will be no show this Sunday, Feb. 6. Instead, the February sky-shows are Monday Feb. 7 at 12 noon and Sunday, February 13 at 4:00 PM. These shows, and the rest of the Spring 2011 schedule, can be found on the planetarium web site.
Here’s a Google Trends graph showing searches for “Ophiuchus” over the last 30 days. The spike comes after a Minnesota astronomy instructor, Parke Kunkle, mentioned in an interview that the sun glides through the constellations of the zodiac on a different schedule than it did a few thousand years ago, and therefore the dates for the zodiacal signs used in astrology no longer match up with the sun’s position. To add to the fun, he mentioned that, in addition to the famous twelve, the sun also passes through Ophiuchus, the serpent bearer. Chaos ensued.
As Kunkle knew, the shift he spoke of has been known for over 2,000 years. It is due to the Precession of the Equinoxes, the same wobble that means Polaris has not always been and will not always be our North Star. Precession is covered in most Astronomy 101 courses, including ours. Why this old news went viral would be an interesting question to explore some time.
Astrologers were quick to point out that they use a “Tropical Zodiac” anyway. In it the signs are merely seasonal markers, now independent of the constellations from which they originally drew their names. Not that I endorse the practice of astrology, but fair enough. As someone interested in sundials, I have seen the zodiacal signs used as seasonal markers in just this way.
Case closed? Hardly! It’s a great excuse to demonstrate the Precession of the Equinoxes and point out Ophiuchus at the 2011 New Year show this Sunday and Monday. (See the calendar on the planetarium site for more info.)