June 2024
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Chasing Galileo - 21-day old moon comparison

My sketch of the moon same lunar day as Galileo’s sketch

Image take at eyepiece of 70mm TV Ranger while sketching on 7/14/09

Galileo’s drawing of the third quarter moon was made on December 18, 1609 according to widely accepted dates calculated by lunar scientist Ewen Whitaker. He used the solar colongitude and [...]

Chasing Galileo: Jupiter and Neptune in the same field of view

Galileo noted a fixt star (at left), now known to be Neptune on this sketch from December 28, 1612

Skymap Pro chart of Jupiter and Neptune (the square at left), December 28, 1612

My sketch of Neptune with Jupiter and the Galilean moons

Galileo made the first recorded observation of Neptune in 1612 when Neptune [...]

Chasing Galileo - fourteen-day moon

fourteen-day (full) moon

The full moon rises as the sun sets on the 14th day of the lunar month. A small telescope, such as the 70mm f.8.7 Televue Ranger I’m using for this series of sketches is a perfect instrument for full moon viewing. So are binoculars. The moon is [...]

Chasing Galileo – Head of Orion cluster

Galileo’s Head of Orion cluster

Jane’s Head of Orion cluster

Astrophoto of Orion Head cluster by Morris Jones

Map of the constellation Orion

Galileo looked at the fuzzy patch surrounding the head of Orion through a telescope, and resolved many starts not previously known. He called it Nebulosa Orionis.

Look between the shoulder stars Betelgeuse and [...]