Astronomy July 2015

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.

United States
Kalmbach Publishing Co. - Magazines
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US$ 42,99
12 Edições

nesta edição

2 minutos
new online interactive features!

This is a big year for the Hubble Space Telescope: 2015 marks its 25th anniversary. I hope you enjoyed our April issue commemorating Hubble and all of its accomplishments. I want you to know of an exclusive online story about Hubble with bonus graphics and interactive elements. Here is how it begins … “There remains only the privilege of waving the astronomers farewell on their voyage to the stars — in imagination riding with the Captain on his bridge down the bay till the pilot takes us off and puts us ashore.” So wrote journalist David Woodbury about the latest grand astronomical project, the building of the 200-inch Hale Telescope on Palomar Mountain, California, in 1939. The vision of astronomer George Ellery Hale, the famous 200-inch instrument was, when built, the world’s…

2 minutos
exoplanet explosion

CORRUGATED GALAXY New findings show that the Milky Way may be 50 percent larger than previously estimated, with large-scale ripples. ANCIENT IMPACT Researchers found two 125-mile-wide (200km) scars from an asteroid that impacted Earth over 300 million years ago in Central Australia. CERES PLUME A bright spot in one of Ceres’ craters may be a plume of outgassing material; it appears in images before the crater floor rotates into view. Not long ago, the dream of discovering how common planets are in the universe was simply that — a dream. Planetary scientists believed they knew something about the formation of solar systems and thought planets might be common among other star systems, but they really didn’t know. Once astronomers found the first incontrovertible evidence for planets around another star, however, the rush of evidence accelerated. By the…

4 minutos
it’s genetic

I recall the first time that I saw the famous movie of the windy November morning in 1940 when the Tacoma Narrows Bridge, connecting Tacoma and the Kitsap Peninsula across Puget Sound in Washington, tore itself to pieces. There she was, “Galloping Gertie” as the bridge was known, wildly bucking and twisting in a 40 mph (60 km/h) wind. Then, suddenly, in a matter of only a few seconds, the third-longest suspension bridge ever built at the time was no more! To this day, the Tacoma Narrows Bridge remains a textbook example of engineering gone wrong. Structures are subject to vibrations, and if you aren’t careful, those vibrations can spell big trouble. Enter Professor Andy Keane. The year is 1994, and Keane and his colleagues at Southampton University in the UK…

4 minutos
send astronauts to zappafrank

Celebrities know that names have power. That’s why Robert Zimmerman and Cherilyn Sarkisian decided to call themselves Bob Dylan and Cher. Yet little poetry or stateliness was employed when it came to naming the universe’s contents. Indeed, astronomy possesses the most inconsistent nomenclature in all of science. Here’s a primer for newbies — and a refresher for the rest of us. The brightest stars enjoy proper names, though just a few dozen remain in use today. Some have punch, like Sirius and Arcturus. Such names also serve to recall ancient mythologies. Medium-bright stars are referenced by a different system created in the 17th century, when 1,564 stars got mostly Greek letter designations, like Gamma (γ) Arietis. The majority of stars — over a million have been cataloged — remain unnamed or at…

1 minutos
from our inbox

Are there aliens out there? My first reaction to “Let’s cut the UFO crap” (March issue, p. 9) was disappointment in the editor of a great magazine. Next, I felt that such bullying arrogance about a view you hold is an insult not only to those having the opposite view, but also to everyone. Who would disagree with one who calls those with other views naïve? Scientists, pilots, and presidents have professed seeing UFOs. Do we demean all of them? — Jim Hoover, Huntington Beach, California Cool things Congratulations on your 500th edition of Astronomy (March 2015). The “500 coolest things about space” was a great idea. I give monthly slide presentations at the local observatory open houses for our astronomy club’s outreach programs. I’ve been reading your magazine and taking notes for over…

3 minutos
dark matter evades … itself?

PRIMITIVE STARS. Two stars in the Sculptor Dwarf Galaxy contain extremely few elements heavier than helium, indicating that they formed from gas enriched by only one supernova, probably one of the first stars formed in Sculptor. Ever since the “missing mass problem” came to the forefront of galaxy studies in the 1930s, scientists have been looking to answer the question of dark matter. They can’t see it in any part of the electromagnetic spectrum, but they can infer its existence based on the gravitational effects it has on the surrounding universe. Because of its mysterious properties, astronomers spend most of their time trying to determine what dark matter is by eliminating what it can’t be. In a recent study of 72 galaxy cluster collisions, published in the March 27 Science, a…