Daniel Ethier

@[email protected]
65 Followers
122 Following
166 Posts

I'm a retired middle school math teacher and cross country coach. Before teaching, I worked as a software engineer.

I am interested in computers, math, science, history, and politics. I enjoy running, amateur astronomy, drone photography, and programming.

Websitehttps://www.gradekeeper.com/dethier/
Daniel EthierFeb 26

The Rosette Nebula, which is to the left of Orion. This is a total of about 16 hours of imaging over 7 sessions spread over about 2 weeks. The second image uses different processing to enhance the oxygen (the blue).

#astronomy

Daniel EthierNov 28

The Pacman Nebula. This is about 20 hours of imaging over 4 nights. It is about 9500 light years away from us and about 25 light years in diameter.

#astronomy

Daniel EthierNov 13

The northern lights tonight were not nearly as good as last night, but there were moments where things picked up. This panorama is from just after 10:00.

#aurora

Daniel EthierNov 12

A couple more photos of the amazing northern lights from tonight.

#aurora

Daniel EthierNov 12

A couple of my photos of the amazing northern lights from tonight.

#aurora

Daniel EthierNov 6

Panorama of tonight's northern lights. Two photos, handheld with my iPhone, stitched together with Panorama Stitcher on my Mac.

#astronomy

Daniel EthierOct 28

The Triangulum Galaxy. This is the result of almost 24 hours of imaging over 5 nights. This galaxy is about 2.7 million light years away. It is about 60,000 light years in diameter, a bit more than half the size of our Milky Way galaxy.

#astronomy

Daniel EthierSep 30, 2025
The Andromeda Galaxy. We had 6 consecutive nights of very clear skies, just beautiful weather, with the moon new to a thin crescent setting before imaging began. This is a mosaic of five individual images. Each individual image was about 5 hours so the total imaging of the galaxy itself (which was in all the individual images) is about 25 hours. #astronomy
Daniel EthierSep 2, 2025
Hint of the northern lights visible low in the sky from the Twin Cities this evening.
Daniel EthierSep 1, 2025

The Dumbbell Nebula. This is about 5 1/2 hours of imaging over three nights. Very clear all three nights, with stars visible right down to the roofs of the neighboring houses. This is the result of a star that exploded about 10,000 years ago resulting in this expanding nebula. It is about 1360 light years away and about 2 light years in diameter.

#astronomy