Astronomy - June 2015

This map unfolds the entire night sky from sunset (at right) until sunrise (at left). Arrows and colored dots show motions and l ...

1° SCULPTOR e Path of Comet Catalina N E b + f g g c June 1 6 11 16 21 26 July 1 Comet Catalina (C/2013 US10) 1' June 8, 11:0 ...

10° AURIGA PERSEUS Capella TAURUS Mercury Aldebaran June 24, 30 minutes before sunrise Looking east-northeast 1° HERCULES b h 84 ...

Open Flat Closed 44 ASTRONOMY • JUNE 2015 A: If the Barringer Meteor Crater impact event in Arizona occurred in a modern city, i ...

WWW.ASTRONOMY.COM 45 Delporte’s group finished their study and presented their report in 1928, and two years later the book Déli ...

Into the blue Blue LEDs may have warranted a Nobel Prize in physics, but the lights are bad news for astronomers. by Eric Betz ...

THE AFTERNOON SKIES WERE clear and blue like countless cen- turies of others in Chile’s Atacama Desert when the blast rang out. ...

48 ASTRONOMY • JUNE 2015 Smith worked with the Chilean govern- ment in 2013 to craft a new lighting ordi- nance that limits tota ...

WWW.ASTRONOMY.COM 49 and big cities. These lights confine them- selves to a small band of the electromag- netic spectrum that as ...

50 ASTRONOMY • JUNE 2015 were 48 percent more attracted to LED lamps, regardless of bulb color, than they were to high-pressure ...

WWW.ASTRONOMY.COM 51 moved forward with plans to replace 2,600 streetlights with LEDs at a cost of about $1.2 million. Over the ...

AS JUNE ROLLS AROUND, observers north of the equator think less about galaxies and more about what they want to target as the ce ...

B44 B45 M4 NGC 6144 Cederblad 130 σ Scorpii LBN 1105 IC 4605 22 Scorpii IC 4606 Antares Emission Nebula Antares Antares Reflecti ...

Vega Arcturus Jupiter Spica Regulus Sun Mars Venus Capella Procyon Betelgeuse Sirius Rigel W N E S 54 ASTRONOMY • JUNE 2015 D ra ...

WWW.ASTRONOMY.COM 55 reaches our planet’s surface. Anybody in the lighter outer region of the shadow (which astronomers call the ...

Pacific Ocean Atlantic Ocean Gulf of Mexico Greatest eclipse Path of totality Nashville St. Louis Kansas City Salt Lake City Por ...

WWW.ASTRONOMY.COM 57 appear bright if their compositions are just so. Meteor showers might reach storm levels if we pass through ...

TAYLOR MAHONEY 58 ASTRONOMY • JUNE 2015 A renowned meteorite hunter turns his gaze to the sky as part of a growing network of fi ...

WWW.ASTRONOMY.COM 59 measurements indicate that thousands of pounds of these meteoric debris breach our atmosphere each day and ...

60 ASTRONOMY • JUNE 2015 fireballs. He hopes data from one event will help hunt down the meteorite. Astronomers have labored to ...