Space Contents Archive

I proved we live on a spherical earth (for some reason it is still needed in 2023)

Watercolor painting of the Pillars of Creation, as imaged by JWST. I fell in love with physics because of this nebula, first imaged by Hubble. I have painted it twice now. I also have a physics degree now and teach quantum physics to high schoolers. :)

Anyone know the name of these two nebula below the Milky Way here? Photo I took last weekend in NSW Aus

Eratosthenes and the Circumference of the Earth

This clip (https://www.reddit.com/r/Damnthatsinteresting/comments/13u7opg/how_the_ancient_greeks_knew_the_earth_was_round/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=1&utm_term=1) showed up again so I need to ask a question, because the story confuses me. What did Eratosthenes use as a time reference? How did he determine “the same time” at Syene and Alexandria ? Clearly he could not use the sun since that is one of the measured variables. Sorry if this is a dumb question, but it has been bugging me for a while.

The Blue Horsehead Nebula

IC 4592, also known as the Blue Horsehead Nebula, is a reflection nebula located in the Scorpius constellation[1][2][3][4][5]. It is lit by Nu Scorpii, a star in the same constellation[1]. Reflection nebulas are made up of very fine dust that reflects the light of nearby stars[5]. IC 4592 has a distinctive horsehead shape, but is overwhelmingly blue in color[4]. The main part of the molecular cloud complex that IC 4592 is a part of is also cataloged as IC 4592[3]. The nebula is rarely photographed due to its location and faintness[2]. Citations: [1] https://en.wikipedia.org/wiki/IC_4592 [2] https://www.galactic-hunter.com/post/ic4592 [3] https://science.nasa.gov/ic-4592-blue-horsehead-reflection-nebula [4] https://skyandtelescope.org/online-gallery/ic-4592-the-blue-horsehead-nebula/ [5] https://www.astrobin.com/fr45sp/B/ By Perplexity at https://www.perplexity.ai/search/278a4456-b884-4346-bb5a-5437229a1844 Imaged by Telescope Live, processed in Siril and Photoshop

Moon 3 big Craters

Theophilius, Cyrillus and Catharina crater on moon from Poland, This is my first zwo asi 678mc photo. Telescope Zomion 1400/150 Date: 26.05.2023 https://preview.redd.it/n1g7cihhgn2b1.png?width=5346&format=png&auto=webp&v=enabled&s=437eb782c6abe85ddb5382a4ffa69585cc82b829

Little moon

Pillars of Creation: Backyard 5 inch refractor vs Hubble nearly 3 decades later.

Pillars of Creation in the Eagle Nebula - M16

Now that Blue Origin has ‘landed’ its second lunar contract, what’s next?

NGC 4651. It is located 72 million light-years away in the constellation of Coma Berenices. It has recently cannibalized a dwarf galaxy that has distorted its outer region and created streams of stars, gas, and dust surrounding the galaxy. [3480 x 1972] (Credit: ESA/NASA & D. Leonard)

Sun 28 05 2023

Sun and some interesting sunspot regions, enlarged a bit. 3315 region has currently 28 sunspots, classified as beta-gamma-delta. Stack of 60 frames, Nikon D7500, 400mm focal, baader OD 3.8 filter.

Is Betelgeuse about to go Supernova?

Da Moon with my telescope

is it a top astronomy graduate program?

i have come up with a list of astronomy phd programs that i want to apply for in the coming cycle. i am aiming for top-notch astronomy programs, but not necessary caltech-like. any programs within the top 10-15 is very good. i have came up with **UColorado Boulder**. but i am unsure if it is a very highly ranked and well regarded program with name recognition in the US. my career goal is to get a faculty job so i am aiming for top-ranked programs. i know it is too early to decide where to apply but i specifically want to know if UColorado Boulder is a very highly-ranked, well-regarded, top 10-15 astronomy program with name recognition in the US? looking for experienced individuals :)