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 EthierDec 26
Randy CassinghamDec 26
The comparison is not favorable.
Daniel EthierDec 18
Mathew IngramDec 18

We should help teens with social media not ban them from it

Blaming social media for teen mental health issues obscures the real issues, and solutions like Australia's could make things worse

https://mathewingram.com/work/2025/12/17/we-should-help-teens-with-social-media-not-ban-them-from-it/?utm_source=mastodon&utm_medium=jetpack_social

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 EthierOct 17
Dan GillmorOct 17

Trump's insane tariffs are wiping out countless small businesses. His apparatchiks and big-business pals don't mind -- that's plainly one of their goals.

https://www.cnbc.com/2025/10/17/how-much-trump-tariffs-are-costing-small-businesses.html