<p>Neptune, the eighth and farthest planet from the Sun, was visited for the first and last time by NASA’s Voyager 2 mission in 1989. Since then, the NASA/ESA Hubble Space Telescope has been attempting to unearth the myriad mysteries surrounding this cool, majestic behemoth — including deciphering why it has the fastest wind speeds of any planet in the Solar System, and what lies at its centre.
</p><p>More information: &lt;a href="<a rel="nofollow" class="external free" href="http://www.spacetelescope.org/images/potw1808a/">http://www.spacetelescope.org/images/potw1808a/</a>" rel="nofollow"&gt;www.spacetelescope.org/images/potw1808a/&lt;/a&gt;
</p><p>Credit:
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NASA, ESA, and M.H. Wong and A.I. Hsu (UC Berkeley)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/51268976@N08">Hubble ESA</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/hubble_esa/39647231494/">Neptune’s shrinking vortex</a>