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Astronomy July 2019

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in a user-friendly style that's perfect for astronomers at any level.

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United States
Kalmbach Publishing Co. - Magazines
12 Issues

in this issue

2 min.
the magic of apollo 11

Follow the Dave’s Universe blog: www.Astronomy.com/davesuniverse Follow Dave Eicher on Twitter: @deicherstar I remember it like it was yesterday. (Well, OK, not yesterday. It was 50 years ago.) As an excited 7-year-old kid interested in space, I was abuzz to watch the first Moon landing. I remember receiving special parental permission to stay up late. It was July 20, 1969 — an amazing time in history. Richard Nixon loomed over the White House, not yet implicated in the crimes that would bring him down. The first troop withdrawals began in Vietnam, a process that would last another six years. Preparations were commencing for the Woodstock music festival in upstate New York the following month. And the inhabitants of planet Earth were waiting to see Neil Armstrong and Buzz Aldrin step out of the…

2 min.
astro letters

We welcome your comments at Astronomy Letters, P. O. Box 1612, Waukesha, WI 53187; or email to letters@astronomy.com. Please include your name, city, state, and country. Letters may be edited for space and clarity. Correction On page 54 of the April issue, we mistakenly used an image of M63 as M94. (The M63 image is correct on page 55.) Here is the image we should have used. Spotting Jupiter I’m writing in response to Stephen James O’Meara’s recent “Naked-eye Mars in daylight” column in the February 2019 issue. I live in southwest Utah, and 2012 was a banner year for us. We had an annular eclipse in May, Venus transiting the Sun in June, and the Moon occulting Venus in August. This last event was unfortunately clouded out by rain, but I did get…

1 min.
speeding pulsar

Scientists recently discovered a bizarre neutron star brightly beaming out energy as it hurtles through space. The pulsar, named J0002+6216, is a rapidly rotating neutron star left over from a supernova explosion. Spinning 8.7 times per second, the pulsar gives off bursts of radiation like a lighthouse as seen from Earth, alerting astronomers to its whereabouts and motion. When they homed in on the object with NASA’s Fermi Gamma-ray Space Telescope, they found a tail of radio emissions trailing behind it. Pointing directly at the supernova remnant that created it, the orange tail indicates the pulsar is blasting away from the explosion. Based on their calculations, astronomers think the pulsar is fleeing the remnant at 2.5 million mph (4 million km/h), putting it among the fastest 2 percent of pulsars…

1 min.
hot bytes

HIDDEN GIANT Japanese astronomers found a 30,000-solarmass black hole hiding in an interstellar gas cloud by watching the gas swirl around the massive object. FAMILIAR TERRAIN Slot canyons spotted by Cassini on Saturn’s moon Titan may form like those on Earth — through sporadic heavy flooding, but of methane, not water. COSMIC CONNECTION Researchers traced meteorites that fell near Sariçiçek, Turkey, to the impact that created a 22 millionyear-old crater on the dwarf planet Ceres.…

4 min.
two ghostly galaxies lack dark matter

Last year, astronomers were flabbergasted when they discovered a galaxy almost entirely devoid of dark matter. As the first galaxy ever found lacking the elusive substance — which is thought to account for 85 percent of the universe’s mass — the find left some researchers delightfully intrigued, and others understandably skeptical. “If there’s [only] one object, you always have a little voice in the back of your mind saying, ‘But what if you’re wrong?’” said astronomer Pieter van Dokkum of Yale University, who led last year’s groundbreaking study, in a press release. “Even though we did all the checks we could think of, we were worried that nature had thrown us for a loop and had conspired to make something look really special whereas it was really something more mundane.” Now, in…

1 min.
quick takes

FARTHER REACHES If confirmed, a newfound dwarf planet some 140 times farther from the Sun than Earth, nicknamed FarFarOut, will become the most distant known object in the solar system. FLUES OPEN Two newly found exhaust vents, dubbed “galactic center chimneys,” are channeling matter and energy away from the Milky Way’s supermassive black hole. TEAMING UP NASA has its first international partner for the planned Gateway lunar outpost: Canada. TIGHT-KNIT Astronomers have spotted massive twin stars nestled closer together than any pair found so far. They orbit each other at some 30 AU, or about the distance between the Sun and Neptune. FLARE-UP NASA research has found herpes viruses reactivate, though often without symptoms, in 61 percent of the astronauts on longer missions to the International Space Station. HOP TO IT Sparse water molecules stuck in the Moon’s soil remain tightly…