Jump to content

  •  

Phil Harrington's Cosmic Challenge



If you're like me, you have probably seen Jupiter, Saturn, the Orion Nebula, and all of the sky's showpiece objects more times than you can count. And while they are truly spectacular and well worth revisiting, you may be looking for something new, something challenging to observe.

That's the premise behind this new monthly e-column here on Cloudy Nights. Each month, we will look for objects that, quite honestly, many amateurs don't even know exist!



Cosmic Challenge: M109

May 01 2018 05:20 AM | PhilH in Phil Harrington's Cosmic Challenge

Messier did not live to see a second edition of his catalog, but objects 104 through 110 have been added posthumously by others. M109 joined the ranks in 1953, when astronomy historian Owen Gingerich noted Messier's observations of six additional "Méchain objects," now known as M104 through M109.

Read story →    *****

Cosmic Challenge: Leo II

Mar 31 2018 09:54 AM | PhilH in Phil Harrington's Cosmic Challenge

Last April, this column profile the dwarf spheroidal galaxy Leo I, discovered by chance in 1950 by astronomers Robert Harrington (still no relation!) and A.G. Wilson as they were scanning the Palomar Sky Survey. I ended that column saying that "Using the right eyepiece and knowing the field will help you add this dwarf spheroidal to your list of conquered challenges with comparative ease. But don't get too cocky. Spotting its sibling, Leo II is an even greater challenge. But we will leave that for a future column." Well, that future is now.

Read story →    *****

Cosmic Challenge: NGC 2419

Mar 04 2018 08:21 AM | PhilH in Phil Harrington's Cosmic Challenge

Probably known better by its nickname the "Intergalactic Tramp" bestowed by Harlow Shapley in 1944, NGC 2419 is unusual among winter's deep-sky objects for many reasons.

Read story →    *****

Cosmic Challenge: The Orion Galaxy

Feb 03 2018 10:06 AM | PhilH in Phil Harrington's Cosmic Challenge

You've heard of the Andromeda Galaxy and the Orion Nebula, but how about the Orion Galaxy? Probably not. But would you believe the New General Catalog lists 21 galaxies in Orion, and the Index Catalog adds another 9? That's a pretty respectable tally. Of those 30 Orion galaxies, I find this month's challenge particularly intriguing because it lies so close to everyone's favorite winter deep-sky object, M42. Yet, I am sure that very few observers have seen it.

Read story →    -----

Cosmic Challenge: Alphabet Soup

Jan 02 2018 08:36 AM | PhilH in Phil Harrington's Cosmic Challenge

The Moon's terminator is a fascinating sight through all telescopes. Here, along the lunar sunset/sunrise line, lighting can strike familiar lunar features in very unusual ways, transforming them in ways that go unsuspected when the Sun rides high overhead.

Read story →    -----

Cosmic Challenge: Abell Galaxy Cluster 426

Dec 07 2017 06:02 AM | PhilH in Phil Harrington's Cosmic Challenge

Not long after I got my first "good" telescope, my 8-inch Criterion RV-8 Dynascope Newtonian reflector, as my Christmas gift in 1971, I became fascinated with the Perseus Galaxy Cluster. One reason I am so fond of this collection of more than 500 galaxies is that the cluster grows as the telescope's aperture increases. Small backyard scopes will show the two big kids on the block, NGC 1272 and NGC 1275, but even the largest amateur instruments fail to show all of the "little guys."

Read story →    *****

Cosmic Challenge - NGC 404

Nov 17 2017 08:36 PM | PhilH in Phil Harrington's Cosmic Challenge

Did you know that I discovered a comet in the fall of 1973? I was out with my venerable 8-inch Criterion RV-8 Dynascope Newtonian reflector, just hopping around the autumn sky, when I noticed stars weren't focusing sharply. Thinking the telescope's collimation was off, I aimed at a nearby bright star to check whether the silhouette of the secondary mirror was centered correctly in the star's out-of-focus image. After I tweaked things a bit, all appeared well, so I focused on that star to check things before moving on. Lo and behold, I saw a dim blur of light right next to the star! Checking things further, it wasn't an internal reflection or an optical aberration.

Read story →    *****

Cosmic Challenge: Stephan's Quintet

Oct 01 2017 10:56 AM | PhilH in Phil Harrington's Cosmic Challenge

The canvas on which our picture of the universe is painted relies on the unwavering acceptance of Hubble's Law. Hubble's Law states that a relationship exists between the distance to a galaxy and the speed at which it is receding from us. The farther away a galaxy is, the greater the speed of its recession and farther its spectral lines are shifted toward the red end of the spectrum. For Hubble's Law and the Red Shift Principal to be valid, it must work for not just a few galaxies, but for all. And indeed, it does -- well almost.

Read story →    -----

Cosmic Challenge 61 Cygni: Piazzi's Flying Star

Sep 01 2017 09:48 AM | PhilH in Phil Harrington's Cosmic Challenge

The star 61 Cygni is not bright, nor is it visually distinctive. To the eye alone, it looks just like any other 5th-magnitude point of light deep in the Milky Way flowing through the Swan. But looks can be deceiving! This unremarkable looking star is indeed quite remarkable for its unusually high rate of proper motion. By watching and plotting it against the backdrop of stars over the course of relatively few years, its position shifts at an extraordinarily fast pace. At present, 61 Cyg has a proper motion of more than 5 arc-seconds per year.

Read story →    *****

Cosmic Challenge: Shadow Bands

Aug 03 2017 10:35 AM | PhilH in Phil Harrington's Cosmic Challenge

Enthusiasts think nothing of jetting around the world just to witness the few brief moments of a total solar eclipse. And with good reason, for all who behold the majesty of totality will give impassioned testimony to its unbridled glory. A total solar eclipse is the most beautiful and emotionally charged celestial event of all.

Read story →    -----




Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics