Home > Ephemeris Program, Exoplanets > 11/15/2016 – Ephemeris – Imaging exoplanets from the ground

11/15/2016 – Ephemeris – Imaging exoplanets from the ground

November 15, 2016

Ephemeris for Tuesday, November 15th.  The Sun will rise at 7:40.  It’ll be up for 9 hours and 33 minutes, setting at 5:14.  The Moon, 1 day past full, will rise at 6:43 this evening.

There’s something I never thought I’d see in my lifetime was a telescope on the ground that could image planets around other stars.  Remember that planets shine by reflecting the light of their host stars, and due to their distance of many trillion of miles away, that there would be no hope of separating the planet from the star which is billions of times brighter.  My lifetime includes the launch of Sputnik, the first artificial satellite when I was in the 11th grade.  However with huge telescopes with adaptive optics that take the wiggle out of the atmosphere.  Added to that is the CHARIS instrument on the 8.2 meter Subaru telescope on Mauna Kea in Hawai’i, which not only can see exoplanets around stars, but take their spectra, to analyze chemical compounds in their atmospheres.

Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

CHARIS image

A plot of data from CHARIS shows planets located around a star in the planetary system HR8799. (Images courtesy of N. Jeremy Kasdin and the research team)

The story is here:
http://www.princeton.edu/main/news/archive/S47/82/89C62/?section=topstories

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