November 21, 2017

AstroEvent: Catch Jupiterís Moons in 1-2-3-4 order.

Jupiter+moons at 2200 UT February 1st. (Created by Author in Starry Night).

Recently Iíd caught something at a star party thatís worth looking out for; Jupiterís moons in 1-2-3-4 order.†This event happens 3 to 4 times a month, and is always a good teaching moment to name and explain the four Galilean moons. [Read more...]

AstroEvent: A 2xJovian Moon Transit.

The view from the US East Coast around 8:30PM EST 24 Jan.†(Created by Author in Starry Night).

One of the first things that Galileo noticed with his primitive telescope was the moons of Jupiter. This Ďsolar system in miniatureí fascinated him, as he watched and recorded the changes in position presented by these four moons night to night. Even today, watching these changes can be a fun endeavor, and is a view available to even the smallest telescopes. This week, I challenge you to try and view a double transit of the Galilean moons. [Read more...]