The Sky in November

Some Bright Autumn Double Stars

October 2005 : By Glenn Chaple

Autumn is a season of promise for the stargazers. The nights are getting longer, the air clearer, and those pesky summer mosquitoes are a thing of the past. In a few months, Orion and his magnificent wintry retinue will take center stage. While the autumn night sky appears devoid of bright stars, it’s still home to a rich array of double stars. Here are ten of the best:

Some Bright Winter Double Stars

December 2005 : By Glenn Chaple

The winter night sky, dominated by mighty Orion, is rich with deep-sky splendors. If you can brave the cold, you’ll be rewarded by some of the finest double and triple stars the night sky has to offer.

M74: Galaxy in Pisces

January 2012 : By Glenn Chaple

Last month, we explored the galaxy M33, a notoriously difficult telescopic target due to its extremely low surface brightness. For the same reason, M74 is even more challenging; in fact, many consider it the most visually demanding of all the Messier objects.

A Selection of Double Stars in Cygnus

October 2007 : By Glenn Chaple

Although it’s a Summer Triangle constellation, Cygnus remains well-seen throughout the autumn months. Located in the star-rich fields of the Milky Way, the Swan is home to numerous double stars. Here are eight of the most noteworthy (data from the Washington Double Star Catalog.

A Selection of Double Stars in Andromeda

November 2008 : By Glenn Chaple

Andromeda is home to a fine collection of double stars. Here are eight of the best. Data on magnitudes and separation were taken from the Washington Double Star Catalog.

Struve 817 Orionis

January 2009 : By Glenn Chaple

I’m a big fan of “off-the-beaten-path” sky objects. One of my favorites is the little-known double star Struve 817 - the 817th double star catalogued by the German-born Russian astronomer F. G. W. Struve during a survey conducted between 1824 and 1827.

A White Dwarf You can Actually See!

February 2009 : By Craig Cortis

A double star in Eridanus contains a white dwarf star that is easy to locate and see with small telescopes.

The Winter Circle

February 2009 : By Dave Huestis

Just as the summer sky has the Summer Triangle, the winter sky has its own special asterism, and this one is huge and includes a total of eight bright stars. It’s called the Winter Circle or Winter Hexagon. I’ll explain why you can get both shapes from the stars.

Epsilon Pegasi: The Pendulum Star

September 2009 : By Glenn Chaple

Epsilon Pegasi (Enif) is an optical double star comprised of magnitude 2.5 and 8.7 component stars separated by 144 seconds of arc. Pairs this wide usually don’t merit much consideration, but wait! Epsilon Pegasi has a surprise for us.

Cygnus X-1: A Black Hole You Can Find!

September 2009 : By Craig Cortis

Unusual celestial objects having bizarre or extreme astrophysical properties often make highly desirable observing targets for amateur astronomers wishing to find things outside the scope of the usual, customary star party “menu”. So how do you find something that even the Hubble Space Telescope can’t image in visible light? The answer is surprisingly simple and is my topic for this month.

Beta Persei (Algol, the "Demon Star")

November 2009 : By Glenn Chaple

Are you ready for the eclipse of November 13th? I’m not talking about the sun or moon. I’m referring instead to an eclipse of the fascinating star ß Persei (Algol).

NGC 7293: the Helix Nebula

October 2009 : By Glenn Chaple

NGC 7293, the Helix Nebula, is the nearest planetary nebula (distance ~ 450 LY) and largest in apparent size (12 by 16 arcminutes). Moreover, it’s a 7th magnitude object. An easy telescopic target? Hardly! The magnitudes listed for deep-sky objects are often misleading, and the Helix Nebula is a prime example.

The “Little Big Dipper”

September 2010 : By Jim Hendrickson

An asterism in Cepheus that is easy to find in small telescopes or binoculars is comprised of 10 stars between magnitude 6.0 and 9.5 and very closely approximates the shape of the northern sky’s most famous asterism-the Big Dipper

Omicron Ceti (Mira, the “Wonderful”)

January 2010 : By Glenn Chaple

Last month, we looked at the prototypical eclipsing binary beta Persei (Algol). This month, we turn to another prototype, the classic long-period variable (LPV) omicron Ceti.

Castor: alpha (α) Geminorum

March 2011 : By Glenn Chaple

Are you looking for something new and different to add to your late winter/early spring star party repertoire – a cosmic showpiece guaranteed to elicit a gasp of surprise and wonder from anyone who peers into your telescope? I suggest the double star alpha (α) Geminorum, better know as Castor. One glance at these sparkling magnitude 2.0 and 2.9 diamonds and it’s easy to understand why William Herschel’s son, John, considered Castor the finest double star in the northern sky.

Delta (δ) and Mu (μ) Cephei

October 2010 : By Glenn Chaple

In the southern part of Cepheus is a pair of naked eye variable stars worthy of note. The first, delta (?), is the prototypical Cepheid variable. It ranges between magnitudes 3.5 and 4.4 in a precise 5.37 day period. The rise from minimum to maximum brightness takes about 1½ days; the fade back to minimum involves an additional four.

NGC 457 (the “ET Cluster”)

December 2010 : By Glenn Chaple

Have you seen “ET” lately? Not that cute little alien in Steven Spielberg’s 1982 movie. I’m referring to the ET-mimicking open star cluster NGC 457 in Cassiopeia. Discovered by William Herschel in 1787, NGC 457 is often overlooked because of its proximity to the Messier cluster M103.

β Monocerotis

February 2011 : By Glenn Chaple

Observe one of the sky's best triple stars just 12 degrees east of the Great Orion Nebula.

Observe Delta Cephei

December 2011 : By Gerry Dyck

Gerry Dyck introduces us to variable star observing with the naked eye star Delta Cephei.

November Constellations & Folklore

November 2011 : By Francine Jackson

After enjoying the overhead rescue of Andromeda by the prince charming Perseus, you might notice that Perseus has his foot on a tiny little clump of stars. At first glance, many people believe they have found the Little Dipper, not realizing that the Little Dipper is a part of our northern circumpolar sky, visible whenever you care to look in that direction; instead, that tiny cuplike group is the Pleiades.

Almach

November 2011 : By Glenn Chaple

Last month, I suggested that our featured object, Albireo, may not be the most beautiful double star in the sky and I’d introduce a rival this month. If you guessed that Albireo’s challenger is Almach, the gamma (?) star in Andromeda, you’d be correct!

M33: Galaxy in Triangulum

December 2011 : By Glenn Chaple

Consider the spiral galaxy M33 in Triangulum. Listed as a 6th magnitude object, it’s notoriously difficult to view in telescopes. M33 is elusive because its light is spread over an area four times that of the full moon.

November Moon

November 2012 : By Francine Jackson

As the swamps began to freeze, settlers looking to stay warm during the winter would set traps along them, to try to catch the full, soft, fluffy beaver, who were looking to prepare their winters' naps; this is why the Full Moon of November is called the Beaver Moon. Also, because the weather tends to take a turn toward the chilly, and ice begins to form on our windows, this Moon is also referred to as the Full Frosty Moon.

Fomalhaut

October 2014 : By Francine Jackson

A lone, bright star low in the south graces the early autumn evening sky.

Coathanger Asterism in Vulpecula

September 2012 : By Glenn Chaple

If you slowly scan the southern part of Vulpecula with binoculars or rich-field telescope, you’ll come across a remarkable asterism comprised of 10 stars arranged in the distinct form of a coathanger. Six line up to form the bar, while four others create the hook. It’s quite an eye-opening sight!

NGC 6934: Globular Cluster in Delphinus

October 2012 : By Glenn Chaple

October sees the demise of the summer Milky Way and its swarm of globular clusters centered on the constellation Sagittarius. A few, notably M15 in Pegasus, lag behind to grace our autumn skies. Another of these stragglers is NGC 6934 in Delphinus. This small 9th magnitude globular was discovered by William Herschel in 1785. In early star atlases and in modern-day “Herschel 400” guides, it bears the designation H1031 - the 103rd entry in Category I (bright nebulae) of Herschel’s deep sky catalog.

Struve 2816 and 2819: Triple and Double Stars in Cepheus

November 2012 : By Glenn Chaple

There’s something hypnotic about a double star – two gleaming points of light shining bravely through the surrounding darkness. A triple star is even more mesmerizing. Place a double star and triple star in the same eyepiece field, and the visual effect is stunning. This is what greets the eye when you view the triple/double star combo Struve 2816 and Struve 2819.

Maserthim (γ Arietis)

December 2012 : By Glenn Chaple

I’m a double star aficionado; my sky gazing motto is “double stars are twice the fun!” Unlike the “faint fuzzies” most backyard astronomers prefer, double stars aren’t hidden by light pollution or bright moonlight. They aren’t the exclusive property of big-scope owners. In fact, many showpiece doubles are within reach of small-aperture instruments. The common 60mm refractor with its crisp stellar images delivers exquisite views of double stars - especially twin systems.

NGC 7662: the Blue Snowball

January 2013 : By Glenn Chaple

What could be a more appropriate telescopic destination for a wintry night in January than the “Blue Snowball?” More formally known as NGC 7662, the Blue Snowball is a beautiful planetary nebula located in Andromeda. Discovered by William Herschel in 1784, it sports as the nickname implies a circular form and eye-pleasing bluish hue.

M78: Reflection Nebula in Orion

March 2013 : By Glenn Chaple

It’s understandable that M78 should be overlooked by backyard astronomers. Not far away is the much brighter, much more easily found, and much, much more spectacular M42 - the Orion Nebula. This deep-sky masterpiece was spectacular even through the eyepiece of my 3-inch scope. M78, on the other hand, was a faint blob that seemed to sport an off-center nucleus.