Eggplant.place

346d

JSTOR now have a free account with an Independent Researcher category. You can access 100 documents per month. https://www.jstor.org/action/showLogin #research #education #science #history #economics 📚📘

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2y

Italian mathematician and physicist Vito Volterra was born #OTD in 1860.

One of Volterra's most famous contributions came in the field of mathematical biology with his work on population dynamics. He formulated the The Lotka–Volterra equations which are frequently used to describe the dynamics of biological systems in which two species interact, one as a predator and the other as prey.

Books by Vito Volterra at PG:
https://www.gutenberg.org/ebooks/author/34164

#books #science #mathematics

Vito Volterra (3 May 1860 – 11 October 1940)

Black and white portrait of Vito Volterra with a full beard and mustache, looking directly at the camera. He wears a formal dark suit and has slightly wavy, graying hair.

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2y

A mind-blower for a Friday evening:

This deceptively simple-looking graph is a spectrum of *gravitational waves* ringing through the Milky Way.

The waves may be caused by a chorus of supermassive black holes colliding all across the universe. Whoa!

https://arxiv.org/abs/2306.16227 #science #space #physics #astronomy

Spectrum of gravitational waves.
Or, in the language of the paper: Properties of the common correlated signal detected in DR2new. Free spectrum of the RMS induced by the excess correlated signal in each frequency resolution bin (with width defined by the inverse of the data span, ∆f = T−1). The straight line is the best power-law fit to the data.

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344d

That's why I write #SpeculativeFiction things are always right if I'm making everything up 😜😂
Also, did you know to create a fictional world from scratch you have to start with creating the #Multiverse? At least that's what I've been told... 😅

@bookstodon @books
@worldbuilding @humor @humor @humor@lemmy.world @aiop

#FantasyMemes #SciFiMemes #Fantasy #SciFi #Memes #Humor #Humour
#Low #High #Epic #Science #Opera #Hard #CottageCore #SolarPunk #Comedic #Whatever
#Book #Books #Bookstodon
#BoostingIsSharing

Why researching before writing is so, so important.

Screenshot from book MADERING MILLER: His skin was the color of just-pressed olive.

Picture of just pressed olive that is an alien looking lime green.

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2y

Born in 1894, physicist Marietta Blau’s research led to a way to capture the tracks of speeding subatomic particles.

In 1937, Blau & Hertha Wambacher made a discovery that launched the field of particle physics. But she was forced to pause her work in 1938 bc of the Nazis.

Blau was nominated several times for the Nobel Prize but never won. Cecil F. Powell later built on her work & earned the Nobel Prize in Physics. https://www.sciencehistory.org/stories/magazine/the-dark-stars-of-marietta-blau/ #history #science #historyremix

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2y

#OTD in 1715.

A total solar eclipse is visible across northern Europe and northern Asia, as predicted by Edmond Halley to within four minutes accuracy. He also drew a predictive map showing the path of totality across Great Britain. The original map was about 20 miles off the observed eclipse path, mainly due to his use of inaccurate lunar ephemeris. After the eclipse, he corrected the eclipse path, and added the path and description of the 1724 total solar eclipse.

#books #science #astronomy

Halley's map of the path of the Solar eclipse of 3 May 1715 across England.

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344d

If you need a blast of beauty (and who doesn't?) I highly recommend browsing the new Astronomy Photographer of the Year winners. They're spectacular -- and neither of these shots even made it to #1.

https://www.rmg.co.uk/whats-on/astronomy-photographer-year/galleries/overall-winners-2025 #space #science #nature #art #photography

"During a routine time-lapse observation of the solar chromosphere [the thin, reddish layer of the Sun’s atmosphere above the visible surface], I captured a serendipitous moment when an aircraft crossed the field of view. Preserving this transient frame, I employed multiple blending modes to enhance the details of the solar background. Beyond stacking individual video frames, I processed the sequence, undertook colour inversion and synthesised 100 images through combined mean and minimum blending. This dual approach effectively accentuated both bright plages [active regions in the chromosphere] and dark laments through enhanced contrast.

"The composite image reveals the evolution of the Sun’s dynamic surface across a two-hour observational period, while the aircraft’s two-second transit remains frozen in time. This layered imaging rearranges time, blending celestial bodies and human technology in one photo."

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"This is one of my biggest astrophotography accomplishments to date, and the largest panorama I have ever captured, with the full resolution image containing over a billion pixels from 62 images stitched together. I had envisioned this composition for a long time, capturing the twin glacial rivers with the Milky Way core off to the left of the image, as well as the famous Southern Cross and other pointers high in the centre sky."

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2y

Polish Physicist Albert A. Michelson died #OTD in 1931

His most famous experiment - Michelson-Morley experiment, was conducted in 1887 in collaboration with Edward Morley. Their experiment for the expected motion of the Earth relative to the æther, the hypothetical medium in which light was supposed to travel, resulted in a null result. Their results leaded H. Lorentz to devise his Lorentz contraction equations as a means of explaining the null result.

https://www.gutenberg.org/ebooks/author/4093

#books #science

Photograph of Nobel Laureate Albert A. Michelson.

Black and white photograph featuring A.A. Michelson with a well-groomed mustache.

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This diagram illustrates the folded light path used in the Michelson–Morley interferometer that enabled a path length of 11 m. a is the light source, an oil lamp. b is a beam splitter. c is a compensating plate so that both the reflected and transmitted beams travel through the same amount of glass (important since experiments were run with white light which has an extremely short coherence length requiring precise matching of optical path lengths for fringes to be visible; monochromatic sodium light was used only for initial alignment). d, d' and e are mirrors. e' is a fine adjustment mirror. f is a telescope.
Albert Abraham Michelson (1852 – 1931) with Edward Morley (1838 - 1923) - aip.org
Fig. 4 from "On the Relative Motion of the Earth and the Luminiferous Ether".

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341d

What REALLY Happened At The Scopes Monkey Trial | Encyclopaedia Britannica

https://www.youtube.com/watch?v=VCFgowTD4ug

#history #education #americanhistory #science

"William Jennings Bryan (seated at left) being interrogated by Clarence Seward Darrow, during the trial of the State of Tennessee v. John Thomas Scopes, July 20, 1925. That Monday afternoon, because of the extreme heat, Judge Raulston moved court proceedings outdoors. The session was held on a platform that had been erected at the front of the Rhea County Courthouse to accommodate ministers who wanted to preach during the time of the trial. Defense lawyers for Scopes (John R. Neal, Arthur Garfield Hays, and Dudley Field Malone) are visible seated to the extreme right. One of the men at left, with his back to the photographer, appears to be Scopes. The court reporters are seated at the table. Creator/Photographer: Watson Davis. - picryl.com

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342d

#RFKJr fires top #NIH scientist weeks after she files #whistleblower complaint

Dr. Jeanne Marrazzo’s complaint reportedly involved the Trump admin’s #hostility toward #vaccines

The US *#health* secretary, RFKJr, has fired a top scientist at the National Institutes of #Health (NIH) just 3 weeks after she had filed a whistleblower complaint against the Trump admin relating to its hostility towards vaccines, according to a report.

#science #medicine #OrchestratedShutdown
https://www.theguardian.com/us-news/2025/oct/03/rfk-jr-jeanne-marrazzo-nih-fired

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2y

Aurora colors come from atoms that are trying to shed some of their energy.

In very thin air, oxygen survives in a delicate, high-energy state that emits green light. In denser air, atomic collisions knock oxygen to a lower-energy state that emits red. Nitrogen is a robust emitter that glows bright in even lower, denser layers of the atmosphere.

Beautiful science.

https://www.swpc.noaa.gov/content/aurora-tutorial #aurora #science #space #nature

Just at Civil twilight the Aurora Start to show up in my Southern and Northern Sky, despite the partially blue sky and waxing crescent Moonlight, it was amazing and I captured it from my Observatories in Yellow Springs, Ohio on Friday evening until around 12:30am when clouds rolled in to cover the Awesome display.

Taken by John Chumack on May 10, 2024 @ Yellow Springs, Ohio

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2y

These mean looking sunspots are the cause of the strongest geomagnetic storm (G5 - Severe) in 20 years!

They are really huge, spanning about 16 Earth diameters. Auroras are happening now and probably will continue over the weekend.

Pic with a 2415mm focal length Dall-Kirkham telescope with a 2X Barlow, a Baader Astrosolar filter, and a bandpass infrared filter (850 nm).

#science #sunspots #sun #aurora #astrodon #astrophotography

Close-up picture of a region in the solar surface covered with sunspots, irregular looking with dark centers and spaghetti-like structures reaching from the center to the borders. The surrounding region is covered with solar granules.

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Edited 2y ago

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2y

French chemist Antoine Lavoisier died #OTD in 1794.

He is best known for his development of the law of conservation of mass, which states that mass is neither created nor destroyed in chemical reactions. This principle helped to debunk the phlogiston theory, which was a prevailing theory at the time that suggested substances released a material called "phlogiston" when they burned. He also made significant contributions in understanding respiration as a form of combustion.

#science #chemistry

Jacques-Louis David - Portrait of Monsieur Lavoisier (cropped)

Portrait of an 18th-century man (Lavoisier) with powdered hair, wearing a black coat and white ruffled cravat, glancing away thoughtfully.

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Hand sketch engraving made by madamme Lavoisier in the 18th century featured in "Traité élémentaire de chimie" .

Lavoisier performed his classic twelve-day experiment in 1779 which has become famous in history. First, Lavoisier heated pure mercury in a swan-necked retort over a charcoal furnace for twelve days. A red oxide of mercury was formed on the surface of the mercury in the retort. When no more red powder was formed, Lavoisier noticed that about one-fifth of the air had been used up and that the remaining gas did not support life or burning. Lavoisier called this latter gas azote. He removed the red oxide of mercury carefully and heated it in a similar retort. He obtained exactly the same volume of gas as disappeared in the last experiment. He found that the gas caused flames to burn brilliantly, and small animals were active in it as Joseph Priestley had noticed in his experiment. Finally, on mixing the two types of gas, i.e. the gas left in the first experiment, and that given out in the second experiment, he got a mixture similar to air in all respects. In his experiments Lavoisier analysed air into two constituents: the one which supports life and combustion, and is one-fifth by volume of air he called oxygen, the other four-fifths which does not he called azote. This latter gas is now called nitrogen. From the two gases he synthesised something that has the characteristics of air.

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342d

Viruses number in the trillions yet remain relatively obscure. But what we’re learning about one group of viruses that target bacteria, called bacteriophages, may shape the future of medicine. This week, it’s “Not Just a Phage” on Big Picture Science.

Listen here: https://bigpicturescience.org/episodes/not-just-a-phage

#podcast #science

The image displays a purple tinted bacteriophage, also known as a phage, against a green and yellow starburst background.

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328d

NASA’s Perseverance rover has found possible evidence of ancient microbial life in Martian rock. Can we test the discovery without the now-suspended Mars Sample Return Mission? Why we’re Mad About Mars on this week’s Big Picture Science.

Listen here: https://bigpicturescience.org/episodes/mad-about-mars

#podcast #science #space

A computer graphic of Mars as seen from space, showing a small northern ice cap and the dark scar of Valles Marineris.

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344d

In our latest #SETILive #podcast, doctoral student Sanne Bloot details some of the characteristics of a white dwarf star that was found to be emitting a strange, repeated radio signal. Listen to the full episode: https://www.seti.org/outreach/seti-live/

#space #science

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343d

Trump is no Napoleon.

Excerpt from 'Jacquard's Web' on Joseph-Marie Jacquard, who pre-dated IBM over a century in using punched cards to issue instructions to machines.

#uspol #politics #cdnpoli #alttext #science

Excerpt from book 'Jacquard's Web' on Joseph-Marie Jacquard, who pre-dated IBM by over a century in using punched cards to issue instructions to machines. Quote follows.

The aspects of Napoleon’s personality and vision that mattered most to Jacquard were unconnected with the new leader's political or military success. Rather, they were related to his respect and admiration for science. This, like the intensity of Napoleons own personal ambition, lay at the core of his personality. Indeed, once Napoleon became the undisputed ruler of
France in 1799 he deliberately set out to give an enormous boost to French science and industry.

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345d

#PPOD: This picture from the NASA/ESA/CSA James Webb Space Telescope features the gravitational lensing of the quasar known as RX J1131-1231, located roughly six billion light-years from Earth in the constellation Crater. It is considered one of the best lensed quasars discovered to date, as the foreground galaxy distorts the image of the background quasar into a bright arc, creating four images of the object. Credit: ESA/Webb, NASA & CSA, A. Nierenberg

#space #science

$A small image of a galaxy distorted by gravitational lensing into a dim ring. At the top of the ring are three very bright spots with diffraction spikes coming off them, right next to each other: these are copies of a single quasar in the lensed galaxy, duplicated by the gravitational lens. In the centre of the ring, the elliptical galaxy doing the lensing appears as a small blue dot. The background is black and empty.$

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2y

English self-taught mathematician and physicist Oliver Heaviside was born #OTD in 1850.

He invented a new technique for solving differential equations, independently developed vector calculus, and rewrote Maxwell's equations in the form commonly used today. He significantly shaped the way Maxwell's equations are understood and applied in the decades following Maxwell's death. His practical experience in telegraphy provided a foundation for his later theoretical work.

#books #science #physics

Oliver Heaviside.

A man with a beard and suit standing in front of a building.

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Cover of Electromagnetic theory
by Heaviside, Oliver, 1850-1925

Publication date 1922
Topics Electromagnetic theory, Vector analysis, Electric waves
Publisher London : Benn

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2y

#OTD in 1618.

Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made).

The elliptical orbits of planets were indicated by calculations of the orbit of Mars. The third law expresses that the farther a planet is from the Sun, the slower its orbital speed, and vice versa.

https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion

#science #astronomy

Portrait of Johannes Kepler.

August Köhler - Kepler-Museum in Weil der Stadt

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330d

Radio observations with the Allen Telescope Array (ATA) have, as part of an international observing campaign, helped discover an unprecedented burst of radio activity from a tidal disruption event (TDE). TDEs happen when an unfortunate star wanders too close to a supermassive black hole (SMBH) and is ripped apart by its strong gravitational forces. These events light up the cosmos across all wavelengths, from visible and X-ray light to radio waves.

Learn more: https://www.seti.org/news/allen-telescope-array-helps-uncover-hidden-black-hole-tearing-apart-a-star/

#science

Artist’s interpretation of two massive black holes (MBHs) within a galaxy. A tidal disruption event unfolds around the MBH that resides away from the galactic center and matter from a disrupted star swirls into a bright accretion disk, launching an energetic outflow and resulting in two bright radio flares.

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329d

Next #SETILive: Do Aliens Speak Physics?
TODAY, 16 October, 2:30 pm PDT

Do Aliens Speak Physics?: And Other Questions about Science and the Nature of Reality is a mind-bending exploration into what it would mean, scientifically and philosophically, for humans to communicate with an extraterrestrial intelligence through the language of physics. Join communications specialist Beth Johnson and co-author Daniel Whiteson for a discussion.

WATCH LIVE: https://youtube.com/live/hwLao7jjFVw

#science #seti

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148d

#FDA to weigh easing limits on unproven peptides favored by #RFKJr & other “#MAHA” [Making America Hurl Again🤮]
figures

The FDA will hold a meeting this summer to consider easing restrictions on more than a half dozen peptide injections, a group of unapproved therapies that have become popular among “wellness influencers”, “fitness gurus” & celebrities.

#law #Trump #HHS #health #science #medicine #PublicHealth #ConspiracyTheories #BrainWorm #USpol
https://apnews.com/article/peptides-fda-kennedy-injection-bpc157-37bf2f94f0e8a57da76e67a03b58ff0f

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2y

#OTD in 1743.

French physicist Jean-Pierre Christin published the design of a mercury thermometer using the centigrade scale with 0 representing the melting point of water and 100 its boiling point.

Available at : Annales des sciences physiques et naturelles, d'agriculture et d'industrie
By Société d'agriculture, sciences et industrie de Lyon. via @googlebooks

#books #science #physics #thermometry