Thursday, May 11, 2017
The Ellensburg WA sky for the week of 5/13/17
Saturday: Saturn is a half a fist to the right of the Moon at midnight.
Sunday: So you think your mother has problems on Mother’s Day because she had you as you as a child? Her mother issues can’t be as bad as Cassiopeia’s issues. First, she was chained to a chair for boasting about her beauty. Second, she has to revolve around the North Star night after night. Third, her daughter Andromeda was nearly killed by a sea monster. Look for poor Cassiopeia about one and a half fists held upright and at arm’s length above the north horizon at 10 p.m. Cassiopeia looks like a stretched out “W”.
Monday: The Space Shuttles have been retired. But NASA is still making plans about the future of space flight. Here is a presentation about the past and future of American space flight https://goo.gl/hApbaf. It is interesting to compare the sizes of these real spaceships to the dozens of fictional spacecraft summarized on a poster found at http://goo.gl/F95aEL.
Tuesday: Give me an “M”. Give me a “3”. What does that spell? “M3.” “Big deal,” you say. It was a big deal to French comet hunter Charles Messier (pronounced Messy A). M3 was the 3rd comet look-alike that Messier catalogued in the late 1700s. M3 is a globular cluster, a cluster of over 100,000 stars that is 32,000 light years away. It is too dim to be seen with the naked eye but is fairly easy find with binoculars. First find Arcturus six fists above the southeast horizon at 11 p.m. Move your binoculars up a little so two stars of nearly identical brightness are in your field of view. When the top star is in the lower left part of your field of view, there should be a fuzzy patch near the center of your field of view. This is M3.
Wednesday: Mercury is as far as it is going to get from the Sun this month in the morning sky. Often that means good viewing. But not this month. Mercury is less than a half a fist above the east horizon at 5 a.m. Venus will be much easier to see at one fist above the east horizon. By early July, Mercury will be visible low in the western evening sky.
Thursday: This is a good time of the year to find the Big Dipper. It is nearly straight overhead at 9:30 p.m. The cup is to the west and the handle is to the east. You can always use the Big Dipper to find some other bright stars. First, follow the curve, or arc, of the Big Dipper down three fists into the southern sky. This is the bright star, Arcturus, the second brightest nighttime star we can see in Ellensburg. Next, continue on a straight line, or spike, another three fists down toward the south horizon to the star Spica. Spica is the tenth brightest nighttime star we can see in Ellensburg. It is known as the Horn Mansion, one of 28 mansions, or constellations, in the Chinese sky. You now know how to use the Big Dipper handle to “arc” to Arcturus and “spike” to Spica.
Friday: Jupiter is four fists above due south at 10:11 p.m.
The positional information in this column about stars and planets is typically accurate for the entire week. For up to date information about the night sky, go to https://nightsky.jpl.nasa.gov/planner.cfm.