Credit & Copyright: Stephen Mudge
Explanation:
On July 3rd,
planet Earth
reached aphelion, the farthest point in
its elliptical orbit around the Sun.
Each year, this day of the most distant Sun happens to occur
during winter in the southern hemisphere.
That's where this aphelion sunrise from 2015 was captured in a
time series composite against the skyline of Brisbane, Australia.
Of course, seasons
for our fair planet are not determined by
distance to the Sun, but by the tilt of Earth's rotational axis
with respect to the ecliptic, the plane of its orbit.
Fondly known as the
obliquity of the ecliptic,
the angle of the tilt
is about 23.4 degrees from perpendicular to the orbital plane.
So the most distant sunrise occurs during northern summer, when
the planet's north pole is tilted toward the Sun
and the north enjoys longer, warmer days.
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 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Publikacii s klyuchevymi slovami:
Sun - afelii - Solnce
Publikacii so slovami: Sun - afelii - Solnce | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
