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Sky Watch by J. Alex Knoll

The lonely star swims with the fishes

Thursday’s full moon is known as the Beaver Moon or the Frosty Moon. It rises around sunset and sets around sunrise. Friday and Saturday the moon is with Taurus, the bull’s red eye Aldebaran high to the left and the Pleiades star cluster higher still. Monday night look for the moon near the Gemini twins Castor and Pollux.

Halloween falls right in between

The waxing moon reaches first-quarter Thursday, and as darkness falls on Halloween, it shines high in the south, with the bright star Fomalhaut almost straight below.     As a holiday, Halloween stretches back thousands of years, but not as a day of costumes and trick-or-treating. It coincides with earth’s path around the sun, falling midway between autumnal equinox and winter solstice.

Even eclipsed, this star blinds

If you didn’t already know about the partial solar eclipse just before sunset Thursday, you’re not likely to have solar glasses at the ready. Do not look at the eclipsed sun for even a moment as it can cause lasting eye damage or blindness. But you can still watch safely with little preparation.

It’s a crowded solar system

If you’ve been out before dawn you’ve likely seen Jupiter blazing in the east. Early Friday morning, the gaseous giant shines left of the waning crescent moon. The following morning you’ll find it above the moon and forming a loose triangle with the star Regulus, the heart of Leo the lion.

Its far side is always dark to us

The dark hours at week’s end are still brightened by the glow of the waning Hunter’s Moon, which rises mid-evening and dominates the night sky until daybreak. On clear days this week, you may even see the moon in the west after sunrise.

Earth’s shadow blots out this week’s full moon

With sunrise now after 7am, perhaps you’ve seen an exceptionally bright light in the south before dawn? Looking up, did you see the constellation Orion? That’s Sirius, the brightest star in the heavens, known as the Dog Star for its place amid Canis Major. Sirius rises around 2am in the east-southeast. Close to the horizon, it pulses a dazzling rainbow of colors, its light refracted by earth’s atmosphere like that from a prism. Closer to daybreak, when Sirius is high in the south, its light cuts through less of our atmosphere and appears a brilliant, cold white.

The equinox ushers in fall

Week’s end finds the waning crescent moon in the company of Jupiter before dawn. Around 6am Friday morning, look for the moon high in the east with Jupiter to its lower left. The same time Saturday the moon shines just six degrees from Old Jove. Then Sunday, the now razor-thin crescent is well below Jupiter, while the first-magnitude star  Regulus, is just six degrees away.

A pair of planetary pairings

The waning moon rises in the late evening at week’s end and is high in the southwest with the approach of the rising sun. Each night it rises a half-hour later, so that by last-quarter on the 15th it crests the northeast horizon at midnight.

Close as Mercury, far as Neptune

The moon waxes through our evening skies from a thin crescent at week’s end to first-quarter Tuesday September 2. Friday Luna shines just two degrees above the first-magnitude star Spica low in the southwest.     Sunday the moon appears farther east at sunset, forming a tight triangle with Saturn to the west and Mars to the south. The two planets appear equally bright, shining at magnitude 0.6, but Saturn’s golden glow and Mars’ red hue make them easy to tell apart.

Escape urban lights to see this sight

     Each August, as the kids head back to school, the galaxy is tilted  in such a way that the Milky Way stretches overhead in full glory. With Monday’s new moon, this may be the best week of summer to gaze on this river of stars. To fully appreciate it you’ll need dark skies away from any urban glow well after sunset. Give your eyes a few minutes to get accustomed to the darkness, tilt your head back and get lost in the glow.