Thursday, May 25, 2017
The Ellensburg WA sky for the week of 5/27/17
Saturday: In 1979, the group Foreigner recorded the song “Head Games”. They could have been singing about the constellations Hercules and Ophiuchus when they said “head games, it’s just you and me baby, head games, I can’t take it anymore” because the heads of these two constellations have been right next to each other in the nighttime sky for all of human history. And just to make it easy for you, a star that bears an Arabic name that means “the head” represents each head. In Hercules, it's Ras Algethi (head of the kneeler); in Ophiuchus, Ras Alhague (head of the serpent charmer). At 11 p.m., Ras Alhague, the brighter of the two, is three and a half fists held upright and at arm’s length above the east-southeast horizon. Ras Algethi is about a half a fist to the upper right of Ras Alhague.
Sunday: Are you thirsty when you get up in the morning? If so, that’s okay because the Big Dipper is positioned to hold water in the morning sky. Look three fists above the northwest horizon at 4:30 a.m. You’ll see three stars that make a bent handle and four stars that make a cup.
Monday: Venus is one fist above due east at 4:30 a.m.
Tuesday: At 11 p.m., the bright star Regulus is less than a fist from the upper left of the Moon. But what if it is cloudy or you are study inside all day and night? Easy, check out the Moon online. One of the best live Moon maps is found at http://goo.gl/wRXQqa. See the most up to date lunar images at fantastic resolution, down to about two meters. You could easily tell the difference between a car and a minivan on the moon.
Wednesday: The questions who, what, where, and when can only be asked with a “W”. At 10:30 p.m., the W-shaped constellation Cassiopeia is about one and a half fists above due north. The middle star in the W was used as a navigation reference point during the early space missions. The American astronaut Gus Grissom nicknamed the star Navi, his middle name Ivan spelled backwards. After he died in the Apollo 1 fire, the star name was kept as a memorial.
Thursday: The month of June is named after Juno, the queen of the Roman gods and the mythological protector of the Roman state. In ancient Rome, the month began when the crescent moon was first seen in the evening sky from Capitoline Hill in Rome. If we still started months this way, June would start on a different day each year. Celebrate the first sunset in June by actually watching it… and then looking for the visible planets. At 9:30 p.m., Mars is about a half a fist above the west-northwest horizon and Jupiter is nearly four fists above the south horizon. If you wait an hour and a half – just 90 minutes, you can see Saturn nearly one fist above the southeast horizon.
Friday: The bright star Capella is one and a half fists above the northwest horizon at 9:30 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.