Credit & Copyright:
The Soviet Lunar Program
Explanation:
This historic picture was humanity's first glimpse of the far side of
the
Moon. It was taken by the Soviet spacecraft
Luna 3 in October of 1959. Luna 3 followed closely on the heels of
another Soviet probe, Luna 2,
which had become the
first spacecraft to impact the Moon
on September 13th of that same year.Why does the Moon have a far side? Gravitational tidal forces within the Earth-Moon system have synchronized the Moon's period of rotation around its axis with its orbital period at about 28 days. So, as the Moon moves around its orbit its rotation exactly compensates, keeping the same face toward the Earth.
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:
far side - обратная сторона - Луна - приливные силы
Публикации со словами: far side - обратная сторона - Луна - приливные силы | |
См. также:
Все публикации на ту же тему >> |