by APOD Robot » Tue Jun 14, 2022 4:05 am
Satellites Behind Pinnacles
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.
[url=https://apod.nasa.gov/apod/ap220614.html] [img]https://apod.nasa.gov/apod/calendar/S_220614.jpg[/img] [size=150]Satellites Behind Pinnacles[/size][/url]
[b] Explanation: [/b] What are all those streaks across the background? Satellite trails. First, the foreground features picturesque rock mounds known as Pinnacles. Found in the [url=https://youtu.be/7XOkWFIjz_M]Nambung National Park[/url] in Western [url=https://en.wikipedia.org/wiki/Australia]Australia[/url], these human-sized spires are made by unknown processes from ancient sea shells ([url=https://www.chicagotribune.com/news/ct-xpm-2011-05-11-ct-x-c-fossils-in-chicagoland-buildin20110511-story.html]limestone[/url]). Perhaps more eye-catching, though, is the sky behind. Created by [url=https://www.nasa.gov/leo-economy/faqs]low-Earth orbit[/url] satellites reflecting sunlight, all of these streaks were captured in less than two hours and digitally combined onto [url=https://www.instagram.com/p/CeA8Y5oLWfb/]the single featured image[/url], with the foreground taken consecutively by the same camera and from the same location. Most of the [url=https://apod.nasa.gov/apod/ap170221.html]streaks[/url] were made by the developing [url=https://en.wikipedia.org/wiki/Starlink]Starlink[/url] constellation of communication satellites, but some are not. In general, the [url=https://apod.nasa.gov/apod/ap140525.html]streaks[/url] are indicative of an increasing number of [url=https://apod.nasa.gov/apod/ap210601.html]satellites[/url] nearly continuously visible above [url=https://solarsystem.nasa.gov/planets/earth/in-depth/]the Earth[/url] after dusk and before dawn. [url=https://cdn.pixabay.com/photo/2019/09/04/08/24/cat-4451003_1280.jpg]Understanding[/url] and [url=https://apod.nasa.gov/apod/ap191014.html]removing[/url] the effects of satellite trails on images from Earth's ground-based cameras and telescopes is now important not only for [url=https://www.pcmag.com/news/starlink-satellites-are-photo-bombing-astronomy-images]elegant astrophotography[/url], but for humanity's [url=https://ui.adsabs.harvard.edu/abs/2022ApJ...924L..30M/abstract]scientific understanding[/url] of the [url=https://apod.nasa.gov/apod/ap210802.html]distant universe[/url].
[table][tr][td=left][url=https://asterisk.apod.com/discuss_apod.php?date=220613][b]<< Previous APOD[/b][/url][/td] [td=center][url=https://asterisk.apod.com/view_retro.php?date=0614][b]This Day in APOD[/b][/url][/td] [td=right][url=https://asterisk.apod.com/discuss_apod.php?date=220615][b]Next APOD >>[/b][/url][/td][/tr][/table]