Credit & Copyright: Galaxy Zoo Project,
ING
Explanation:
What is that green thing?
A volunteer sky enthusiast surfing through online
Galaxy Zoo images
has discovered something really strange.
The mystery object
is unusually green, not of any clear galaxy type, and situated below relatively
normal looking spiral galaxy
IC 2497.
Dutch schoolteacher Hanny van Arkel, discovered the
strange green "voorwerp" (Dutch for "object") last year.
The Galaxy Zoo project encourages sky enthusiasts to browse through
SDSS images and classify galaxy types.
Now known popularly as
Hanny's Voorwerp,
subsequent observations have shown that the
mysterious green blob has the same distance as neighboring galaxy IC 2497.
Research is ongoing, but one leading hypothesis holds that Hanny's
Voorwerp is a small galaxy that acts like a large
reflection nebula,
showing the reflected light of a bright
quasar
event that happened in the center of IC 2497 about 100,000 years ago.
Pictured above, Hanny's
Voorwerp was imaged recently by the 4.2-meter
William Hershel Telescope
in the Canary Islands by
Matt Jarvis,
Kevin Schawinski, and
William Keel.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.