Credit & Copyright: Jean-Francois Gout,
Tom Polakis
Explanation:
Look at the Moon
every night and its visible sunlit portion gradually changes.
In phases progressing
from New Moon to Full Moon to New Moon again,
a lunar cycle or lunation is completed in about 29.5 days.
Top left to bottom right, these frames show the range of
lunar phases for 25 consecutive nights beginning on January 18,
following an
almost
complete lunation.
They skip the 2 days just after and 2 days before
New Moon,
when the lunar phase is at best a narrow crescent, close to the Sun
and really hard to see.
Of course, mostly clear Arizona night skies and a little help from
a friend were required to complete this lunar cycle project,
imaging in early evening for the first half and
late evening and early morning for the second half of the lunation.
For extra credit, the cycle was centered on the Full Moon of January 31.
That was the second Full Moon in January, when the Moon was near lunar
orbit perigee and took on reddish hues during a
total lunar eclipse.
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 2025 |
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 - Луна - лунный цикл - лунное затмение
Публикации со словами: Moon - Луна - лунный цикл - лунное затмение | |
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