October 23, 2017

Astro-Challenge: Scouting Out the Lunar Straight Wall.

The waxing gibbous Moon with the Mare Nubium/Rupes Recta region circled. (Photo by Author)

An interesting lunar feature comes into view this week, right around 1st Quarter phase. Located in the Mare Nubium just before the start of the Lunar Highlands sits a feature known as the Lunar Straight Wall. 120 kilometers long and about 400 meters high, this scarp is hard to miss as a long shadow slice along the surface of the Moon. Visible in even small telescopes at moderate magnification, the Lunar Straight Wall is generally visible within 24 hours of 1st Quarter, which occurs this week at 04:56 AM EDT/ 08:56 AM GMT. [Read more...]

AstroEvent(s): A Week of Moons, Tri-Conjunctions, & Lunar Features!

Venus, Vesta, & Pluto in a 5 degree field of view. (Created by Author in Starry Night).

This week offers a grab bag of unique events, far from the humdrum wide conjunctions and difficult to see pairings. The action starts on February 8th with a rare chance to see Saturn’s moons in 1 -8 order. This occurs in a narrow window from 19:01-19:38 UT, and thus favors the Asian Far East. The planet currently rises around 11PM local, and a majority of the moons should still be in order from your corresponding latitude. [Read more...]