Credit & Copyright: Joshua Rozells
Explanation:
What are all those streaks across the background?
Satellite trails.
First, the foreground features picturesque rock mounds known as Pinnacles.
Found in the
Nambung National Park in Western
Australia, these human-sized
spires are made by unknown processes from ancient sea shells
(limestone).
Perhaps more eye-catching, though, is the sky behind.
Created by
low-Earth orbit
satellites reflecting sunlight,
all of these streaks were captured in less than two hours
and digitally combined onto
the single featured image, with the foreground taken
consecutively by the same camera and from the same location.
Most of the streaks were made by the developing
Starlink
constellation of communication satellites, but some are not.
In general, the streaks
are indicative of an increasing number of
satellites nearly continuously visible above
the Earth after dusk and before dawn.
Understanding and
removing the effects of satellite trails on images from
Earth's ground-based cameras and telescopes is now important not only for
elegant
astrophotography, but for humanity's
scientific understanding of the
distant universe.
Astrophysicists:
Browse 2,800+ codes in the Astrophysics Source Code Library
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.
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Publikacii s klyuchevymi slovami:
satellite - Sputniki iskusstvennye
Publikacii so slovami: satellite - Sputniki iskusstvennye | |
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