Recent Astronomy Articles at Cosmic Pursuits

Sightseeing along the Perseus Arm of the Milky Way

February 26, 2021 by Brian Ventrudo Filed Under: Deep Sky

A section of the Perseus Arm of the Milky Way looking overhead from the northern hemisphere in winter.

In the early months of each year, stargazers south of the equator enjoy a dazzling view of a rich part of the Milky Way, one that’s festooned with open star clusters, emission nebulae, and bright blue-white stars. Here, in the constellations Centaurus and Crux, we gaze into one of the two major spiral arms of the Milky Way, the Scutum Centaurus Arm, that originates from the long bar of ancient stars at the core of our galaxy.

An observer looking overhead in the northern hemisphere sees a completely different perspective. Here the view lies in a direction away from the center of the galaxy into the outer reaches of the Perseus Arm, the second major spiral arm that emanates from the galactic core [Read more…] about Sightseeing along the Perseus Arm of the Milky Way

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The Taurus Molecular Cloud

January 25, 2021 by Brian Ventrudo Filed Under: Deep Sky

Not far from the Pleiades and Hyades star clusters along the northern Milky Way lies the coal-black fingers of the Taurus Molecular Cloud, the nearest star-forming region to Earth. Unlike the more famous Orion star factory, with the dazzling Orion Nebula and associated bright blue-white stars, the TMC is not well known to most stargazers. That’s because it doesn’t offer much to see, with no bright nebulae and just a dark and sooty network of tendrils that span more than 30^o of sky. But the TMC is the nearest star-forming region to Earth, making it of considerable interest to astronomers. It’s also a rewarding target for astrophotographers who can capture its structure against the starry background in the constellations Taurus and Auriga [Read more…] about The Taurus Molecular Cloud

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Five Favorite Images from 2020

December 31, 2020 by Brian Ventrudo Filed Under: Astronomy Images and Video

Comet C/2020 F3 (NEOWISE) along with a faint summer display of aurora borealis over Calgary, Canada on July 13, 2020. Image credit and copyright: Amanda Ventrudo.

To call me an astrophotographer would be an overstatement. But that doesn’t stop me from bringing a camera along when stargazing on a clear night to complement some casual visual observations. No image can reproduce what it’s like to look through a telescope or binoculars, especially in dark sky when the eye beholds the scintillation of stars and silver-white nebulae and galaxies against the black matte of the background universe. But images have the advantage of permanence, to some degree at least, and of leaving a record of what we’ve seen and where we’ve been in the night sky over the months and years [Read more…] about Five Favorite Images from 2020

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Was the Christmas Star Real?

November 27, 2020 by Brian Ventrudo Filed Under: History and Famous Astronomers

Sirius, the brightest star in the sky, over a snow-covered spruce tree in December 2019. Image credit: Brian Ventrudo.

O star of wonder, star of night,
Star with royal beauty bright,
Westward leading, still proceeding,
Guide us to thy perfect light.

The Christmas Star – it may be the most famous “star” in history. But was it real? Mentioned just once in the gospel of Matthew, the “Star of Bethlehem”, or the “Christmas Star”, may have guided three wise men from the East in search of a newborn king. A few words written on a scroll two thousand years ago isn’t much to go on, but astronomers have a few ideas that may explain the apparition of a star near the time of the birth of Jesus [Read more…] about Was the Christmas Star Real?

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Nebula Hopping in the Constellation Cygnus

November 23, 2020 by Brian Ventrudo Filed Under: Deep Sky

The North America Nebula (on its side) and above it the Pelican Nebula in the constellation Cygnus.

Like many constellations along the arc of the Milky Way, the constellation Cygnus harbors an embarrassment of celestial riches. There’s everything here: emission nebula, supernova remnants, open star clusters, star clouds, and dark nebulae that reach like intertwined fingers over the bright and unresolved star clouds in this part of the sky. In dark sky, with a pair of binoculars or wide-field telescope, a contemplative stargazer can spend many happy hours hopping from object to object, wondering why more people turn their eyes skyward more often.

Which is what I was doing on a cool northern autumn night as I toured the celestial Swan, looking for a handful of pretty emission nebulae that radiate a deep red light and stand out along the rich star field in this part of the sky. These nebulae make ideal targets for urban stargazers like me because their contrast is readily enhanced with a good light pollution filter which passes their emission while reducing the effect of urban light pollution. The nebula doesn’t appear brighter, but it does have better contrast against fish-grey urban and suburban skies [Read more…] about Nebula Hopping in the Constellation Cygnus

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