Credit & Copyright: C. Lisse, M. Mumma (NASA/GSFC),
K. Dennerl, J. Schmidt, and J. Englhauser (MPE)
Explanation:
The first X-rays ever detected from a
comet were discovered from
Comet Hyakutake with the
ROSAT
satellite on March 27th.
The
discovery is particularly surprising because there was little previous
indication that comets emit any significant X-radiation. As the
comet passed the Earth in
late March, repeated observations with ROSAT also showed that the X-ray
brightness changed over just a few hours. The crescent shape of the X-ray
emission is also enigmatic. One possible explanation is that X-rays
emitted from the Sun are absorbed by water in the comet's coma causing
fluorescence. Another possible explanation involves interaction with the
solar
wind - fast moving particles streaming away from the
Sun.
Information:
The
Scale of the Universe Debate in April 1996
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 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Публикации с ключевыми словами:
comet - comet Hyakutake - комета Хиякутаке - рентгеновские лучи - Солнечный ветер
Публикации со словами: comet - comet Hyakutake - комета Хиякутаке - рентгеновские лучи - Солнечный ветер | |
См. также:
Все публикации на ту же тему >> |