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.


Wednesday, May 3, 2017

The Ellensburg WA sky for the week of 5/6/17

Saturday: Are you thirsty. I’ll wait while you get some water. I will NOT wait while Corvus the crow gets you some water. The Greco-Roman god Apollo made this mistake. He sent Corvus the crow to get some water in the cup known as Crater. Some figs distracted Corvus and he waited for them to ripen so he could eat them. When Corvus got back late, Apollo put Corvus and Crater in the sky with the gently tipping cup just out of the reach of the perpetually thirsty crow. Corvus is a trapezoid-shaped constellation about two fists held upright and at arm’s length above due south at 10 p.m. Crater is just to the right of Corvus.

Sunday: Jupiter is about a half a fist to the right of the Moon at 10 p.m.

Monday: Makemake has a moon (E-I-E-I-O). Last week you read the Solar System moon summary in this column. Or, you used the Solar System moon summary to protect the bottom of a very small birdcage. Never the less, that summary recentlu became out of date. Last year, astronomers announced the discovery of a moon around the distant icy Kuiper Belt object known as Makemake (pronounced MAH-kay-MAH-kay). Makemake joins Haumea, Eris, and an obscure object called Pluto as the only dwark planets known to have a moon. There are a few other objects in theSolar System also known to have moon.s Makemake is too dim for you to see in the night sky. But you can see it in the video found at https://youtu.be/er1sBpyih0s.

Tuesday: Mars’ two small moons, Phobos and Deimos, are not visible in typical backyard telescopes. But they are an interesting study. The prevailing view among most astronomers is that they are captured asteroids. That makes sense given Mars’ proximity to the asteroid belt. But resent findings by European astronomers indicate that Phobos is very porous and made of material similar to the surface of Mars. This implies that Phobos may consist of chunks of Martian debris that was blasted off by numerous impacts and gravitationally bound together. Unfortunately, the Russian Phobos-Grunt probe launched late 2011 to collect material from Phobos crashed to Earth after malfunctioning. For more information about this recent model of Phobos’ formation, go to http://goo.gl/8sw3rM. For more information about Mars, look one fist above the west-northwest horizon at 9 p.m.

Wednesday: You’ve seen all of the top 100 lists: top 100 ways to make a birdhouse, top 100 sushi restaurants in Ellensburg, etc. Now get excited for tonight’s full Moon by reading about and finding some of the lunar 100 at http://goo.gl/ldGvH6 This list describes 100 interesting landmarks on the Moon that are visible from Earth. They are listed from easiest to see, starting with the entire moon itself at number 1, to most difficult (Mare Marginis swirls, anyone?). Stay up all night to binge watch the moon or just make a few observations a month. It’s your decision. It’s our moon.

Thursday: Saturn is about a half a fist above the southeast horizon at midnight.

Friday: This weekend, celebrate Mother’s Day with the big mom of the sky, Virgo. Ancient Greeks and Romans associated this portion of the sky with their own goddess of the harvest, either Demeter (Greeks) or Ceres (Roman). Demeter was the mother of Persephone and Ceres was the mother of Proserpina. According to myth, each of these daughters was abducted causing their mothers great grief. The first star in Virgo rises in the afternoon. Spica, the bright bluish star in the constellation rises at 6:30 and is three fists above the south-southeast horizon at 10 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.