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Archives for July 2015

Short Video of Comet C/2015 F4 (Jacques)

July 30, 2015 by Brian Ventrudo Filed Under: Solar System

At the end of July 2015, the little comet C/2015 F4 (Jacques) passes the splendid double star Albireo, the star that marks the nose of Cygnus, the Swan. The comet was discovered on March 27, 2014 by C. Jacques at an observatory in Brazil.  The comet is a dim 11th magnitude which makes it a very challenging object for visual observers. It may not get much brighter, but the video below gives you a view of this visitor from the outer solar system.

The video was captured by Tom Wildoner, aka the Leisurely Scientist. He assembled the video from 66 individual 30-second exposures using a Canon 6D and Celestron C6-A SCT on an equatorial mount.

Comet C/2015 F4 makes its closest approach to the Sun on August 10, 2015 at a distance of 1.64 astronomical units.

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Filed Under: Solar System comet, solar system, video

Once in a Blue Moon

July 28, 2015 by Brian Ventrudo Filed Under: Solar System

An artificially colored "Blue Moon" of November 2010 imaged from Brooklyn, New York.
An artificially colored “Blue Moon” of November 2010 imaged from Brooklyn, New York.

The second Full Moon of July 2015 arrives on July 31 at 10:43 Universal Time. No doubt the headline writers of the interwebs will be all over this bit of non-news, but as most readers of Cosmic Pursuits understand, a Blue Moon is simply the second Full Moon of a calendar month. Or in another definition, which does not apply here, a Blue Moon is the third full Moon of a season in which there are four Full Moons. In either case, there’s no astronomical significance to the event, and the Moon will not have a blue tinge. Though any Full Moon in summer makes for a pleasant evening walk when you can smell the thick air and scent of summer flowers in this all-too-brief season [Read more…] about Once in a Blue Moon

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Filed Under: Solar System lunar, moon

See the Southern Delta Aquarid Meteor Shower

July 22, 2015 by Brian Ventrudo Filed Under: Celestial Events

MeteorThe Delta Aquarid meteor shower peaks this year around July 28. This annual event favors observers in the southern hemisphere and southerly latitudes in the northern hemisphere, though all observers can see some of these slow-moving meteors. The meteors of the Delta Aquariids appear to radiate from a point near the star Skat (δ Aquarii) in the constellation Aquarius. The shower peaks around July 27-30, but unlike most meteor showers, the Delta Aquarids lack a sharp peak so meteors are visible from mid-July through early August. The maximum hourly rate can reach 15-20 meteors in a dark sky. Because of their angle of entry into the atmosphere, the Delta Aquariids tend to leave long lingering trails which sets them apart from most other meteors.

It’s still a bit of a mystery as to what causes the Delta Aquariids. Some astronomers suspect the event happens when the Earth passes through a stream of debris left by the periodic Comet 96/P Macholtz. The comet was only discovered in 1986, though the meteor shower has been observed since at least the 1870s.

In late July 2015, near the time of the shower’s peak, a waxing gibbous moon will be out until after midnight. So the skies will be darkest and most favorable for seeing meteors a few hours before dawn as the shower peaks on July 27-30.

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Filed Under: Celestial Events aquarius, meteor shower, solar system

Pluto: Stranger Than Expected

July 17, 2015 by Brian Ventrudo Filed Under: Science, Solar System

Ice mountains near the equator of Pluto. These mountains are 3,500 meters high and only 100 million years old.
Ice mountains near the equator of Pluto. These mountains are 3,500 meters high and only 100 million years old.

We have learned again this week, with the fleeting passage of the New Horizons probe past Pluto, that nature is stranger than fiction, better really, with more surprises, plot twists, and interesting imagery than the most adept imaginations can conjure. The data is coming in slowly from Pluto, and we’ve received just a few images of the many yet to come. But here’s what we know from New Horizons so far… [Read more…] about Pluto: Stranger Than Expected

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Filed Under: Science, Solar System pluto

New Horizons Lives Makes Successful Flyby of Pluto

July 14, 2015 by Brian Ventrudo Filed Under: Science, Solar System

Just confirmed at 5:55 PDT… the New Horizons spacecraft is still operating after passing Pluto earlier today. Congratulations to the NASA team for a job well done! The craft is now outbound to the Kuiper Belt and beyond. Stay tuned for more data and images that are (hopefully) coming in from the craft which is 4.5 light-hours away!

LOCKED! We have confirmation of a successful #PlutoFlyby. pic.twitter.com/Krfo9qxxHw

— NASA New Horizons (@NASANewHorizons) July 15, 2015

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Filed Under: Science, Solar System pluto

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