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Brian Ventrudo

The Constellation Corona Borealis

June 22, 2016 by Brian Ventrudo Filed Under: Deep Sky

Illustrated star map showing Corona Borealis and Hercules
Illustrated star map showing Corona Borealis and Hercules

Corona Borealis, or the Northern Crown, is a small but lovely semicircular constellation just to the east of Böotes, the Herdsman. In the months of May and June, shortly after sunset, the constellation lies nearly overhead for northern-hemisphere observers, and well over the northern horizon for southern stargazers. It’s one of the oldest constellations, and one of the few that vividly resembles its name.

The constellation takes its name from the crown, in Greek legend, given to the maiden Ariadne, the daughter of King Minos of Crete.  Ariadne had been abandoned on the island of Naxos by Theseus, the legendary hero who slew the Minotaur.  The god Dionysus rescued the maiden, fell in love with her, and gave her a jeweled crown forged by Hephaestus, god of the forge.  Ariadne and Dionysus had a happy life together.  But she was mortal and eventually died. Dionysus placed her crown in the heavens to remember her [Read more…] about The Constellation Corona Borealis

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Filed Under: Deep Sky constellation, corona borealis, sky tour

Strawberry Moon and Summer Solstice Meet

June 20, 2016 by Brian Ventrudo Filed Under: Stargazing

A strawberry Moon rising over Los Angeles in 2012 (credit: Pacheco at Flickr.com)
A strawberry Moon rising over Los Angeles in 2012 (credit: Pacheco at Flickr.com)

Today the Sun reaches the June solstice, its most northerly point on the celestial sphere. This marks the first day of summer in the northern hemisphere and the first day of winter in the southern hemisphere. And for the first time in 68 years, the June solstice occurs on the same day as the June full Moon, often called the Strawberry Moon [Read more…] about Strawberry Moon and Summer Solstice Meet

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Filed Under: Stargazing moon, solstice, sunset

The Coma Cluster of Galaxies

June 10, 2016 by Brian Ventrudo Filed Under: Deep Sky

The brighter members of the Coma Cluster of Galaxies. The bright elliptical galaxy at left is NGC4889, and the bright elliptical at right is NGC 4874. The bright foreground star at upper right is HD 112887.
The brighter members of the Coma Cluster of Galaxies. The bright elliptical galaxy at left is NGC 4889, and the bright elliptical at right is NGC 4874. The bright foreground star at upper right is HD 112887.

Towards Coma Berenices, a tiny constellation between the handle of the Big Dipper and the haunches of the constellation Leo, the Lion, lies in a tiny expanse of sky an assembly of some of the most distant galaxies visible in a backyard telescope. These are the members of the Coma Cluster of Galaxies, a group of more than 1,000 big galaxies located so far away, their starlight left well before the first dinosaurs walked the Earth [Read more…] about The Coma Cluster of Galaxies

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Filed Under: Deep Sky coma berenices, dark matter, galaxies

New Supernova in Galaxy Messier 66

June 2, 2016 by Brian Ventrudo Filed Under: Deep Sky

A close-up of supernova ASASSN-16fq in the galaxy M66. Courtesy of Terry Hancock at Downunderobservatory.com.
A close-up of supernova ASASSN-16fq in the galaxy M66. Courtesy of Terry Hancock at Downunderobservatory.com.

An automated telescope on Haleakala in Hawaii spotted an exploding massive star in M66, a spiral galaxy in the constellation Leo. It appears to be a Type II supernova, the result of a massive star that has run out of fuel and suddenly collapsed and snapped back against the subatomic forces at play in its core. Like all supernovae, this star is blasting out nearly as much energy as all the other stars in the galaxy, albeit for just a few days [Read more…] about New Supernova in Galaxy Messier 66

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Filed Under: Deep Sky galaxies, supernova

The 2016 Saturn Observing Guide

June 2, 2016 by Brian Ventrudo Filed Under: Solar System

saturnMany casual observers get hooked on amateur astronomy after a first look at Saturn through a telescope.  More than a few have looked through my small refractor on a night of good seeing and asked of Saturn, “Is it real?”

Oh, it’s real, all right.  And incredibly beautiful… the color, the proportions, the apparent 3D perspective of this grand icy world.  It is arguably the finest sight accessible with a small telescope. The planet reaches opposition on June 3, 2016 and will remain bright and large in a telescope over the next few months. Here’s how to find it and see it in a small telescope.

[Read more…] about The 2016 Saturn Observing Guide

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Filed Under: Solar System observing guide, saturn, solar system

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