Q-90.1's Backyard Astronomer

The autumn nights give us cooler, drier air which is ideal for observing the deep sky. Combine that with a moonless night, and it’s the best time of year to look for the Great Andromeda Galaxy.

Each season has that one notable constellation that can serve as a guidepost to that part of the sky. In summer it’s common to use the Summer Triangle, which is still visible high in the west, but in Autumn we have the Great Square of Pegasus.

This year's NASA-sponsored International Observe the Moon Night takes place on Saturday, October 16.

Look high in the northeast for a group of bright stars that resembles a big "W" sitting on its end. This is the constellation of Cassiopeia the Queen.

As we head into Fall, and with solar activity on the upswing, the chances of catching a display of Northern Lights increases.

This year, the September equinox arrives on the 22nd which marks the first day of Fall for the northern hemisphere. The term “equinox” means “equal day equal night” because the length of day and night are about the same on this date.

We begin the week of September 13 with the moon at First Quarter, which looks half illuminated in the south after sunset. That sets the stage for an excellent week of lunar observing.

About halfway up the southern sky in September is the prominent white star, Altair, marking the eye of Aquila the Eagle.

Late summer is the best time to observe the Milky Way. Under a clear sky with no moon or light pollution, you should see it as a faint band of light that stretches overhead from roughly north to south.

After more than a year, the planet Venus finally makes its way back into the evening skies, but you’ll have to look low in the west during dusk to see it.

We say the Moon “waxes” this week because its oval shape grows to become Full on August 22. As it slips further eastward among the stars each night, watch for it to pass below the planet Saturn on August 20 and underneath the brighter Jupiter on the 21st.

The famous annual Perseid Meteor shower reaches its maximum this week. While peak activity occurs on the evening of August 11 and morning of the 12th, the shower will remain active for the entire week.

If you look low in the southeast sky after dark, you’ll see a moderately bright star that doesn’t seem to twinkle very much. It’s the famous ringed planet Saturn, and it's currently at its closest approach to Earth.

The northernmost star in the Summer Triangle marks the tail of Cygnus the Swan, also known as the Northern Cross.

The waxing gibbous moon will end on Friday, July 23, when it becomes the Full Buck Moon. On that same night, you can see Saturn to its left. Look again on July 26 and the moon will be just below Jupiter.

Early in the week of July 12, the Waxing Crescent Moon makes its appearance in the west after sunset. But when the moon looks like a thin crescent, there’s another feature to look for called Earthshine.

The three bright stars of the Summer Triangle are one of the best ways to star hop around the summer sky.

During early summer, the Full Moon will rise far to the south of east and take its lowest path across the southern sky. The thicker atmosphere there sometimes gives the Moon an orangish or even rose color.

June is when the constellation of Scorpius the Scorpion begins to emerge in the southeast. As twilight ends around 10:30pm, look low in the southeast for a bright reddish star – this is Antares, the heart of the Scorpion.

During the month of June, about 90 minutes after sunset, look high in the east, almost overhead for a faint semi-circular pattern of stars. This is the constellation of Corona Borealis, the Northern Crown.