Credit & Copyright: Sergio Eguivar
Explanation:
For the mostly harmless denizens of planet Earth, the
brighter stars of open cluster
NGC
2169
seem to form a cosmic
37.
Did you expect
42?
From our perspective,
the improbable numerical
asterism
appears solely by chance.
It lies at an estimated distance of 3,300 light-years toward the
constellation Orion.
As far as galactic or open star clusters go,
NGC 2169 is a small one, spanning about 7 light-years.
Formed at the same time from the same cloud of dust and gas,
the stars of
NGC 2169 are only about 11 million years old.
Such clusters
are expected to disperse over time as they
encounter other stars, interstellar clouds, and
experience gravitational tides while hitchhiking
through
the galaxy.
Over four billion years ago, our own Sun was likely formed
in a similar
open cluster of stars.
Gallery:
Earth Aurora from Solar Active Region 3664
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.
Publikacii s klyuchevymi slovami:
open cluster - Rasseyannoe skoplenie
Publikacii so slovami: open cluster - Rasseyannoe skoplenie | |
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