Backyard Astronomer - Delta College Public Radio

During mid-spring, a trio of wide-spread stars covers a huge swath of the eastern sky after dark. It’s the Spring Triangle signaling the move into longer days and warmer weather for the Northern Hemisphere.

Each season has that one constellation that serves as a signpost to the sky. In spring, many stargazers use the constellation of Leo the Lion.

Spring is the time of year when the Big Dipper climbs higher into the northern sky, but the Big Dipper is not itself a constellation. It’s only part of a much larger group called Ursa Major, the Great Bear. It also makes for a great guidepost to other stars and constellations!

During the week of March 31, the waxing crescent Moon makes its appearance in the west after sunset. When the moon looks like a thin crescent, there's a feature to look for called earthshine.

With the moon out of the way, the early evening sky remains dark and full of stars, and that gives us some fine objects to explore with binoculars.

This year, the March equinox arrives on the 20th which marks the first day of spring for the northern hemisphere.

This month, the full moon on March 14 is also known as the "Sap Moon" because March marks the tapping of the maple trees. It also coincides with a total lunar eclipse.

Sirius, Procyon, and Betelgeuse form a giant triangle in the southern sky known as the Winter Triangle. And like Orion’s Belt, it can make for an excellent pointer and guidepost to the winter night sky.

Over the last few months, we’ve been treated to the brilliant planet Venus piercing the western sky after sunset. During the first part of March, you’ll have a rare opportunity to watch the elusive planet Mercury join the show!

As the moon wanes and rises later each night, the early evening skies are dark again, allowing us to see the Great Orion Nebula.

From now through mid-March, you’ll have an opportunity to see the crescent phase of Venus when viewed through a telescope.

At the beginning of the week of February 3, the moon shows a crescent shape in the southwest after sunset. But each night, the moon will appear to slip a little further back or eastward among the stars, allowing more of the sunlight side to face the earth.

The parade of four planets visible across the sky will soon reduce to three as Saturn drops lower in the west each night, fading into the glare of twilight by the end of February.

About two hours after sunset, look high in the east for the brilliant planet Jupiter. A little to the lower right of Jupiter is the orange star Aldebaran, the fiery eye of Taurus the Bull.

During the week of January 13, a magnificent parade of planets will arch across the early evening sky. It's also when Mars comes closest to Earth and will be at its brightest.

The moon grows from its first quarter phase this week, before its reaches full on the 13th. The January full moon is called the "Wolf Moon" because of the increased howling wolves make at this time. The Full Moon will also seem to blot out the planet Mars for about an hour, called an occultation.

One of the best known winter constellations, Orion the Hunter, returns to the evening sky.

The dating of our holidays have their roots in the solstice traditions of long ago, and that includes the dating of Christmas.

During the second half of December, you’ll have a rare opportunity to spot all the other major planets in our solar system over the course of one night.

As the phase of the moon grows steadily from first quarter to full, it’s a good opportunity to explore the contrasts of light and dark on its surface.

Low in the east, soon after dark, you’ll find a star so bright that it looks like a fiery beacon in the sky. It’s actually the planet Jupiter, and it’s making its closest approach to Earth this week.

The holidays are one of the most popular times of year for buying a telescope. So, what's the best one to look for?

Two hours after sunset you can’t help but notice several bright stars low in the east and northeast. The brightest one isn’t a star at all, but the planet Jupiter!

The phase of the moon grows this week. By November 15 it becomes full, rising a little north of east soon after sunset. The November Full Moon was called the Beaver Moon by many Native American tribes.

This week offers an evening rendezvous of Venus and the crescent moon.