Hours Gone By

Tenna art by @9Aaaalt29 on twt

you would receive the supply once a month

the brand/type will vary so you could

Working at Harvard in the late 1800’s and early 1900’s as a “Computer”, Annie Jump Cannon cataloged stars using their spectra from photographic plates, in an effort to understand the mysteries and peculiarities of stellar spectra.

This was hard, detailed, nuanced work. By 1889, three years into her work, she had classified over 1,000 stars. By 1913, she could classify 200 stars an hour. She could classify three stars a minute, just by sight. Using a magnifying glass, she could classify stars down to 9th magnitude, 16 times fainter than the human eye can see. And she did this all with exceptional accuracy.

Over the course of her career, she personally classified more than 350,000 stars, accounting for a mind-boggling 98% of all contemporary stellar spectra classifications, a feat that wouldn’t be bested until the 1990’s with automated digital sky surveys.

Cannon used these classifications to develop the Harvard spectral classification system (O–B–A–F–G–K–M), organizing stars by surface temperature and physical properties.

It is hard to overstate just how foundational her work was to modern astronomy and astrophysics. Her classifications have enabled more than a century of breakthroughs in stellar structure and evolution, including the understanding of how stars change over time and how temperature, luminosity, and composition are related. The system underpins the Hertzsprung–Russell (HR) diagram, one of the most important tools in astrophysics, and remains embedded in modern research, from stellar population studies to galaxy evolution.

“But it’s confusing!” If you take the time to educate yourself it’ll no longer be confusing. Otherwise you’re just gonna have to learn to be ok with being confused.

“But it’s weird!” You probably do weird things all the time. Everyone does weird things sometimes. Life goes on.

“But it scares me!” Is it hurting you? No? You’ll be fine. Being scared and being harmed are not always the same thing. Learn to tell the difference and then act accordingly.

And was like, uh, are you missing something there, buddy? Like all that red in northern Africa? Because that's a lot of red.

And I was going to give them the benefit of doubt, since I don't know much about the climate in Northern Africa, aside from Morroco and Egypt, which seem like really hot places, so you know, maybe it's normal there?

But nope, that's not the case:

Some selections from the article:

"The region has been experiencing some of the most intense heat waves in recent years, but in many cases they’ve been under-reported due to misconceptions about Africans’ ability to withstand them.

“Africa is seen as a sunny and hot continent,” said Amadou Thierno Gaye, a research scientist and professor at Cheikh Anta Diop University in Dakar, the capital of Senegal. “People think we are used to heat, but we are having high temperatures for a longer duration. Nobody is used to this.”

my partner and i are all moved into our new place with our kitties and settling in. my store is here and ready to go so i am holding a sale for older/less selling items i'm planning on phasing out. make sure to get them now before theyre gone!! 🫶

my acrylic charms are also now available for international as well! i am shipping from the US, so apologies for the high rates 🙏

please consider supporting us!! we are currently down a car due to someone hitting us head on (no injuries past bruising but my fugly car is totaled 💔) and i am still waiting on my job transfer. it would mean the world to us if you took a gander! :]

check out my store here

The simple yet useful Arabic numeral: