Credit & Copyright: Tony Cook
Explanation:
Have you ever seen the planet Mercury?
This week might be a good time.
Because Mercury
orbits so close to the Sun, it never wanders far from the Sun in Earth's sky.
If trailing the Sun, Mercury will be
visible
low on the horizon for only a short while after
sunset.
If leading the Sun, Mercury will be
visible only shortly
before sunrise.
So at certain times of the year an informed
skygazer with a little determination can usually
pick Mercury out
from a site with an clear horizon.
Above, a lot of determination has been combined with a
little digital trickery to show
Mercury's successive positions
during March of 2004.
Each picture was taken from the same location in Leeds,
England exactly 33 minutes after sunset.
Over the next two weeks, Mercury
will again be well placed for
viewing above the western horizon at sunset,
but by the third week in March it will have faded
and dropped into the twilight.
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:
Mercury - horizon - Меркурий
Публикации со словами: Mercury - horizon - Меркурий | |
См. также:
Все публикации на ту же тему >> |