Credit & Copyright: ESO,
Stefan Gillessen (MPE),
F. Eisenhauer, S. Trippe, T. Alexander, R. Genzel, F. Martins, T.
Ott
Explanation:
At the center of our Milky Way Galaxy lies a
supermassive black hole.
Once a controversial claim, this conclusion is now solidly based
on 16 years of observations
that map the orbits of 28 stars very near
the galactic center.
Using European Southern Observatory
telescopes and sophisticated
near infrared cameras, astronomers patiently measured the positions
of the stars over time, following one star, designated S2, through
a complete orbit as it came within about 1 light-day of the
center of the Milky Way.
Their results
convincingly show that S2 is moving under the influence of the
enormous gravity of a compact, unseen object -- a black hole
with 4 million times the mass
of
the Sun.
Their ability to track stars so close to the
galactic center
accurately measures the black hole's mass and also determines the
distance to the center to be 27,000 light-years.
This deep, near-infrared image shows the crowded inner 3
light-years of the central Milky Way.
Spectacular time-lapse animations of the stars orbiting
within light-days of the galactic center
can be found here.
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:
black hole - Milky Way - Galactic Center - Mlechnyi Put' - centr Galaktiki - chernye dyry
Publikacii so slovami: black hole - Milky Way - Galactic Center - Mlechnyi Put' - centr Galaktiki - chernye dyry | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
