APOD: 2025 June 20 Б Major Lunar Standstill 2024 2025
Explanation:
Edmonton,
Alberta, Canada, planet Earth lies on the horizon.
in this stack of panoramic composite images.
In a monthly time series arranged vertically top to bottom
the ambitious photographic
project
follows the annual north-south swing of sunrise points, from
June
solstice
to December solstice and back again.
It also follows the corresponding, but definitely harder to track,
Full Moon rise.
Of course, the north-south swing of moonrise runs opposite
sunrise along the horizon.
But these rising Full Moons also span a wider range on the horizon
than the sunrises.
That's because the well-planned project
(as shown in this video)
covers the period June 2024 to
June 2025,
centered on a major lunar standstill.
Major
lunar standstills
represent extremes in the north-south range of moonrise driven by the
18.6 year precession
period of the lunar orbit.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.
