Wednesday, April 12, 2017
The Ellensburg WA sky for the week of 4/15/17
Saturday: The first day of spring was March 20. The most recent full moon was April 11. That means tomorrow is Easter. The standard way to determine the date of Easter for Western Christian churches is that it is the first Sunday after the first full moon that occurs on or after the vernal equinox, also known as the first day of spring. Of course, the other standard way is to look for the date of church services celebrating the resurrection of Jesus. There is no Bible story of an “Easter star”. If there were, Spica would be a pretty good choice. The name Spica comes from the Latin “spica virginis” which means “Virgo’s ear of grain”. Spica represents life-giving sustenance rising after a long winter just like the risen Jesus represents life-giving redemption to Christians. Spica is a half a fist held upright and at arm’s length above the east-southeast horizon at 9 p.m., just to the lower right of the Moon. For more information on how to determine the exact date of Easter for any year, go to https://www.assa.org.au/edm.
Sunday: Saturn is about a half a fist to the lower left of the Moon at 5:30 a.m. Its showpiece spacecraft, Cassini, is running out of battery power. So NASA scientists plan to start a sweeping orbital pattern next week that will send it through Saturn’s rings and eventually crash it into Saturn in September. “Why crash a working spacecraft?” you ask. NASA does not want to risk infecting Saturn’s moons Titan or Enceladus with Earth microbes because there is a chance these worlds might have their own microbes. For more information about the last days of Cassini, go to https://goo.gl/AeOcsB.
Monday: If you got up at 5:30 yesterday, you’ll probably be up at that time today, as well. Look for the bright planet Venus a half a fist above the east horizon.
Tuesday: At 9 p.m., Mars is one and a half fists above the west horizon. Jupiter is on the other side of the sky, two fists above the southeast horizon.
Wednesday: This evening, asteroid 2014 J025 will pass by the Earth at a distance that is only about four times greater than the Earth-Moon distance. That’s known as a close call. It won’t be bright enough to see with the naked eye. But it will be bright enough to see with a 4-inch telescope. At 10 p.m., it will be in the constellation Coma Berenices, about six fists above the east-southeast horizon. For more information about this asteroid, including detailed finder charts, go to https://goo.gl/0RLj8N.
Thursday: 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 5 a.m. You’ll see three stars that make a bent handle and four stars that make a cup.
Friday: Remember the old saying: April showers bring… meteors. The Lyrid meteor shower peaks tonight through tomorrow morning. The meteors appear to come from a point to the right of the bright bluish star Vega in the constellation Lyra the lyre. This point is about three fists above the east-northeast horizon at midnight tonight and close to straight overhead near dawn. The best time to look is just before dawn since that is when the radiant, or point from which the meteors appear to come, is high in the sky. This year, the Moon is in the waning crescent phase to it will not be providing much light to obscure the meteors. Typically, this is one of the least interesting major meteor showers of the year. However, it is also one of the most unpredictable. As recently as 1982, there were 90 meteors visible during a single hour. In addition, the Lyrid meteor shower has historical interest because it was one of the first ones observed. Chinese records say “stars fell like rain” in the shower of 687 B.C. As your Mother might say, dress warm and sit in a comfortable chair for maximum enjoyment. Meteors are tiny rocks that hit the Earth and burn up in the atmosphere. For more information, go to http://goo.gl/j87bVB. http://earthsky.org/?p=158735
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.