Tag: Astrophysics

APOD is 20 Years Old

APOD VermeerAstronomy Picture of the Day (APOD) was launched this day in 1995. The massively followed online site is maintained by APOD co-founders Robert Nemiroff and Jerry Bonnell.

The 20th anniversary APOD image is a digital re-pixelation of a Vermeer using over 5,000 APOD images that have been featured on the site.

Nemiroff and Bonnell were interviewed by The Verge.

20 years of space photos: an oral history of Astronomy Picture of the Day

Exploring the cosmos one day at a time

APOD launched on June 16, 1995. In advance of its milestone birthday, I spoke on the phone with the two guys who have run the site by hand for two decades, a seemingly unfathomable task in the age of ephemeral content. How do they do it? A combination of Microsoft Word, a fiery passion for astrophotography, and lots and lots of emails.

So where did the idea originally come from?

Robert Nemiroff: Jerry Bonnell and I shared an office at NASA Goddard Space Flight Center, and we were both — we’re still — active researchers. But the web was growing up, and so we brainstormed to try to figure out how we could contribute to this web. One idea, we thought, was maybe we can make lots of money, and buy a Hawaiian island or something. But that never worked out. [Laughs.]

Read more at The Verge, by Sean O’Kane.

Associate Professor Huentemeyer Provides Updates on HAWC

Petra Huentemeyer
Petra Huentemeyer

Astrophysics Highlights from the APS April Meeting

HAWC Observatory Online
At a press conference, Petra Huentemeyer of Michigan Technological University gave a status update and early results from the High-Altitude Water Chernkov (HAWC) observatory. HAWC will produce a wide-field picture of the universe in TeV gamma rays and cosmic rays. With just one third of its total planned array online, HAWC has already exceeded the sensitivity of its predecessor MILAGRO.

Read more at the American Physical Society News, by Calla Cofield.

Top 25 Hottest Articles in Astroparticle Physics

David Nitz and Brian Fick are each co-authors in 6 of the Top 25 Hottest Articles in Astroparticle Physics for the 2011 year. Four of those are in the top 10, including the top most downloaded article.

The number one article was “Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory,” Astroparticle Physics34, Issue 8, March 2011, Pages 627-639. Other co-authors with or formerly with Michigan Tech are James Chye, Johana Chirinos Diaz, Roger M. Kieckhafer, Niraj Dhital, and Tolga Yapici. READ MORE

Cosmic race ends in a tie

Result puts limit on how ‘lumpy’ space-time can be.
A race between two energetic photons that began more than 7 billion years ago and spanned half the cosmos has ended in a virtual dead heat. The result, if it stands up to scrutiny, would tighten the limits, suggested by some theories, on how ‘lumpy’ space-time can be. The work, to be presented on 11 January at the 219th meeting of the American Astronomical Society in Austin, Texas, by Robert Nemiroff of the Michigan Technological University in Houghton and his colleagues, relies on an analysis of a short-lived, powerful stellar explosion known as a γ-ray burst that was recorded by NASA’s Fermi Gamma-ray Space Telescope in May 2009 and dubbed GRB 090510A. The study focused on two photons, one with an energy of 25 gigaelectronvolts (GeV) and another of about 1.5 GeV, which were separated by just 0.00136 seconds. READ MORE