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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See the Southern Delta Aquarid Meteor Shower
The 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.
Share This:Pluto: Stranger Than Expected
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
Share This:New Horizons Lives Makes Successful Flyby of Pluto
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
Share This:Weekend Stargazing: Crescent Moon and Clusters
The Moon is on the wane this week, a boon for stargazers who crave the darkest sky. But the Moon remains a pretty sight in the early-morning sky before sunrise, thinning down to a slender crescent by the July 12th as it passes through the sprawling Hyades star cluster in the eastern sky and close to the orange giant star Aldebaran. The Hyades is a V-shaped group of stars about three finger-widths wide. Look for the resplendent Pleiades star cluster above the Moon and Hyades. If you can see down to the horizon, you might even see Mercury before it disappears into the glare of the Sun for the month.
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