Credit & Copyright: AntСnio CidadЦo
Explanation:
Our Moon's appearance changes nightly.
This time-lapse sequence shows
what our Moon looks like during a
lunation, a complete lunar cycle.
As the
Moon orbits the
Earth,
the half illuminated by the
Sun
first becomes increasingly visible,
then decreasingly visible.
The Moon
always keeps the same face toward the Earth.
The Moon's apparent size changes slightly, though,
and a slight wobble called a
libration is discernible as it progresses along its elliptical orbit.
During the
cycle, sunlight reflects from the
Moon
at different angles, and so illuminates different features differently.
A full
lunation takes about 29.5 days, just under a month
(moon-th).
APOD in India:
APOD editor to
speak in Delhi on Feb. 12
(registration required)
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:
Moon - lunation - Луна - лунный цикл
Публикации со словами: Moon - lunation - Луна - лунный цикл | |
См. также:
Все публикации на ту же тему >> |