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<title>APOD: 2019 December 10 - Starlink Satellite Trails over Brazil</title> | |
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<h1>Astronomy Picture of the Day</h1> | |
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<a href="archivepix.html">Discover the cosmos!</a> | |
Each day a different image or photograph of our fascinating universe is | |
featured, along with a brief explanation written by a professional astronomer. | |
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<span id="date">2019 December 10</span> | |
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<main> | |
<figure class="center"> | |
<a href="image/1912/StarlinkTrails_Filter_2048.jpg"> | |
<img src="https://apod.nasa.gov/image/1912/StarlinkTrails_Filter_1080.jpg" alt="See Explanation. Clicking on the picture will download | |
the highest resolution version available."> | |
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<figcaption> | |
<b id="title">Starlink Satellite Trails over Brazil</b> | |
<br> | |
<span id="copyright"> | |
<b>Image Credit & Copyright:</b> | |
<a href="mailto: egonf @at@ terra .dot. com .dot. br">Egon Filter</a> | |
</span> | |
</figcaption> | |
</figure> | |
<p id="explanation"> | |
<b> Explanation: </b> | |
What are those streaks over the horizon? | |
New | |
<a href="https://en.wikipedia.org/wiki/Starlink_(satellite_constellation)" | |
>Starlink satellites</a> reflecting sunlight. | |
<a href="https://www.spacex.com/about">SpaceX</a> | |
launched 60 Starlink communication satellites in May and | |
<a href="https://www.spacex.com/news/2019/11/11/starlink-mission" | |
>60 more in November</a>. | |
These satellites and | |
<a href="https://spacenews.com/spacex-submits-paperwork-for-30000-more-starlink-satellites/">thousands more</a> are planned by | |
communications companies in the next few years that may make | |
<a href="ap191014.html">streaks like these</a> relatively common. | |
<a href="https://aas.org/press/aas-issues-position-statement-satellite-constellations" | |
>Concern has been voiced</a> by many in the astronomical community about how reflections from these | |
<a href="https://www.nytimes.com/2019/11/11/science/spacex-starlink-satellites.html" | |
>satellites may affect future observations</a> into space. | |
In the pictured composite of 33 exposures, | |
parallel streaks from Starlink satellites are visible over southern | |
<a href="https://en.wikipedia.org/wiki/Brazil">Brazil</a>. | |
<a href="https://en.wikipedia.org/wiki/Helianthus" | |
>Sunflowers</a> dot the foreground, while a | |
<a href="ap181219.html">bright meteor</a> | |
was caught by chance on the upper right. | |
<a href="https://www.heavens-above.com/">Satellite reflections</a> are | |
<a href="ap980402.html">not new</a> -- the constellation of 66 first-generation | |
<a href="https://en.wikipedia.org/wiki/Iridium_satellite_constellation" | |
>Iridium satellites</a> launched starting 20 years ago produced | |
<a href="ap000502.html">some</a> | |
<a href="ap150902.html">flares</a> so bright that they could | |
<a href="https://www.youtube.com/watch?v=MTGVuPr9Epg">be seen</a> during the day. | |
Most of these old Iridium satellites, however, <a href= | |
"https://www.universetoday.com/141741/the-iridium-flare-era-is-about-to-end/" | |
>have been</a> | |
<a href="https://www.iridium.com/flarewell/">de-orbited</a> over the past few years. | |
</p> | |
<p id="tomorrow" class="center"> | |
<b>Tomorrow's picture:</b> | |
<a href="ap191211.html">supernova firefox</a> | |
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<b>Authors & editors:</b> | |
<a href="http://www.phy.mtu.edu/faculty/Nemiroff.html">Robert Nemiroff</a> | |
(<a href="http://www.phy.mtu.edu/">MTU</a>) & | |
<a href="https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html">Jerry Bonnell</a> | |
(<a href="http://www.astro.umd.edu/">UMCP</a>) | |
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Phillip Newman <a href="https://apod.nasa.gov/apod/lib/about_apod.html#srapply">Specific rights apply</a>. | |
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<br><b>&</b> <a href="http://www.mtu.edu/">Michigan Tech. U.</a><br> | |
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