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<title>APOD: 2019 December 10 - Starlink Satellite Trails over Brazil</title>
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related image is featured each day, along with a brief explanation.">
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<h1>Astronomy Picture of the Day</h1>
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<p>
<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.
</p>
<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.">
</a>
<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>
</p>
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<p>
<b>Authors &amp; editors:</b>
<a href="http://www.phy.mtu.edu/faculty/Nemiroff.html">Robert Nemiroff</a>
(<a href="http://www.phy.mtu.edu/">MTU</a>) &amp;
<a href="https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html">Jerry Bonnell</a>
(<a href="http://www.astro.umd.edu/">UMCP</a>)
<br>
<b>NASA Official:</b>
Phillip Newman <a href="https://apod.nasa.gov/apod/lib/about_apod.html#srapply">Specific rights apply</a>.
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<a href="https://www.nasa.gov/about/highlights/HP_Privacy.html">NASA Web Privacy Policy and Important Notices</a>
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<a href="https://astrophysics.gsfc.nasa.gov/">ASD</a> at
<a href="https://www.nasa.gov/">NASA</a> /
<a href="https://www.nasa.gov/centers/goddard/">GSFC</a>
<br><b>&amp;</b> <a href="http://www.mtu.edu/">Michigan Tech. U.</a><br>
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