September 22, 2019

Astro-Challenge: Spotting Triton.

Triton as seen from Voyager 2. (Credit: NASA/JPL).

This week’s Astro-Challenge is definitely for the “been there, done that” crowd, a hunt that will put that gia-normous light bucket you’ve got sitting in your backyard to good use. August 22nd, the planet Neptune reaches opposition. And yes, we know you’ve spotted the grey-blue world at magnitude +7.9 with no problem, but have you ever seen its elusive moon, Triton? Now is a good time to try and check this fascinating moon off of your “life list.”

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AstroEvent of the Week:29th-September 5th, 2008: Spot Neptune!

Now, to spot a planet that was first located mathimatically.

Now that the Moon is out of the sky this week, it’s a good time to add the outer most gas giant to your “been there, done that” list! First spotted in 1846 by Johann Galle & Heinrich D’Arrest, Neptune’s position was first deduced by the French Mathematician Le Verrier, who himself hated the “grittiness” of rank and file observational astronomy. [Read more...]