Arthur Mee owned a 21cm (8½-inch) aperture reflecting telescope, which he used regularly to observe the Moon and planets.
#HistoryOfAstronomyInWales
#HistoryOfAstronomy
[That's a different Arthur Mee from Arthur Henry Mee (1875-1943), author of the Children's Encyclopaedia.]
#HistoryOfAstronomyInWales
#HistoryOfAstronomy
[That's a different Arthur Mee from Arthur Henry Mee (1875-1943), author of the Children's Encyclopaedia.]
January 15, 2026 at 5:13 PM
Arthur Mee owned a 21cm (8½-inch) aperture reflecting telescope, which he used regularly to observe the Moon and planets.
#HistoryOfAstronomyInWales
#HistoryOfAstronomy
[That's a different Arthur Mee from Arthur Henry Mee (1875-1943), author of the Children's Encyclopaedia.]
#HistoryOfAstronomyInWales
#HistoryOfAstronomy
[That's a different Arthur Mee from Arthur Henry Mee (1875-1943), author of the Children's Encyclopaedia.]
... the Johnson-Morgan UBV photometric system for measuring the brightnesses and colours of stars. He developed a system for classifying galaxies that included the cD galaxy type that dominate the cores of many clusters of galaxies.
#HistoryOfAstronomy
#HistoryOfAstronomy
January 3, 2026 at 7:44 PM
... the Johnson-Morgan UBV photometric system for measuring the brightnesses and colours of stars. He developed a system for classifying galaxies that included the cD galaxy type that dominate the cores of many clusters of galaxies.
#HistoryOfAstronomy
#HistoryOfAstronomy
Today is the 120th anniversary of the birth of the American astronomer William Wilson Morgan (1906-1994) in Bethesda, Tennessee. He carried out research across many fields in astrophysics. He defined the Morgan-Keenan-Kellman system for classifying the spectra of stars, and ...
#HistoryOfAstronomy
#HistoryOfAstronomy
January 3, 2026 at 7:44 PM
Today is the 120th anniversary of the birth of the American astronomer William Wilson Morgan (1906-1994) in Bethesda, Tennessee. He carried out research across many fields in astrophysics. He defined the Morgan-Keenan-Kellman system for classifying the spectra of stars, and ...
#HistoryOfAstronomy
#HistoryOfAstronomy
🔭 #historyofastronomy
Merci pour ce fil, très intéressant !
Merci pour ce fil, très intéressant !
La réponse a été trouvée, il s'agit de la plus grande lunette astronomique au monde !
Construite pour l'exposition universelle de Paris de 1900, c'est un instrument fixe, de 60m de long !! avec une lentille de 1,25 m !!
On remarquera le chariot permettant de faire la mise au point ! 🤪
Construite pour l'exposition universelle de Paris de 1900, c'est un instrument fixe, de 60m de long !! avec une lentille de 1,25 m !!
On remarquera le chariot permettant de faire la mise au point ! 🤪
December 31, 2025 at 12:39 PM
🔭 #historyofastronomy
Merci pour ce fil, très intéressant !
Merci pour ce fil, très intéressant !
Thirty years ago from today, the Hubble Space Telescope completed its observations of the Hubble Deep Field. The reduced data were released for free public use a few weeks later.
#HistoryOfAstronomy
#HistoryOfAstronomy
Today is the 30th anniversary of the start of observations on the Hubble Deep Field, one very small area in the northern sky. The Hubble Space Telescope imaged one field through four different filters over 10 days in December 1995.
#HubbleDeepField
#HDF
#HubbleSpaceTelescope
#HST
#HubbleDeepField
#HDF
#HubbleSpaceTelescope
#HST
December 28, 2025 at 8:08 PM
Thirty years ago from today, the Hubble Space Telescope completed its observations of the Hubble Deep Field. The reduced data were released for free public use a few weeks later.
#HistoryOfAstronomy
#HistoryOfAstronomy
Today is the 10th anniversary of the detection of the second ever gravitational radiation event by laser interferometric observatories. The radiation was caused by merging black holes. The discovery was announced in June 2016.
Wikipedia article: en.wikipedia.org/wiki/GW151226
#HistoryOfAstronomy
Wikipedia article: en.wikipedia.org/wiki/GW151226
#HistoryOfAstronomy
GW151226 - Wikipedia
en.wikipedia.org
December 26, 2025 at 2:06 PM
Today is the 10th anniversary of the detection of the second ever gravitational radiation event by laser interferometric observatories. The radiation was caused by merging black holes. The discovery was announced in June 2016.
Wikipedia article: en.wikipedia.org/wiki/GW151226
#HistoryOfAstronomy
Wikipedia article: en.wikipedia.org/wiki/GW151226
#HistoryOfAstronomy
Today is the 60th anniversary of the fall of a large meteorite near the village of Barwell, Leicestershire, England. The meteorite fractured into hundreds of pieces, some still large, which were scattered over Barwell and the surrounding area.
[Picture: Wikimedia Commons.]
#HistoryOfAstronomy
[Picture: Wikimedia Commons.]
#HistoryOfAstronomy
December 24, 2025 at 7:40 PM
Today is the 60th anniversary of the fall of a large meteorite near the village of Barwell, Leicestershire, England. The meteorite fractured into hundreds of pieces, some still large, which were scattered over Barwell and the surrounding area.
[Picture: Wikimedia Commons.]
#HistoryOfAstronomy
[Picture: Wikimedia Commons.]
#HistoryOfAstronomy
Back from "Ciels d'Encre", an exhibition of ancient astronomy books at the bibliothèque Sainte-Geneviève, Paris.
A display of so many famous titles & authors in the #historyofastronomy...
(please forgive the poor quality of my pictures).
🔭
1/...
A display of so many famous titles & authors in the #historyofastronomy...
(please forgive the poor quality of my pictures).
🔭
1/...
December 11, 2025 at 7:08 PM
Back from "Ciels d'Encre", an exhibition of ancient astronomy books at the bibliothèque Sainte-Geneviève, Paris.
A display of so many famous titles & authors in the #historyofastronomy...
(please forgive the poor quality of my pictures).
🔭
1/...
A display of so many famous titles & authors in the #historyofastronomy...
(please forgive the poor quality of my pictures).
🔭
1/...
The Dutch-American astronomer and plantary scientist Gerard Peter Kuiper (1905-1973), also known as Gerrit Pieter Kuiper, was born 120 years ago today. He made many discoveries across Solar System science.
#HistoryOfAstronomy
[Portrait from the Wikimedia Commons.]
#HistoryOfAstronomy
[Portrait from the Wikimedia Commons.]
December 7, 2025 at 4:41 PM
The Dutch-American astronomer and plantary scientist Gerard Peter Kuiper (1905-1973), also known as Gerrit Pieter Kuiper, was born 120 years ago today. He made many discoveries across Solar System science.
#HistoryOfAstronomy
[Portrait from the Wikimedia Commons.]
#HistoryOfAstronomy
[Portrait from the Wikimedia Commons.]
Honoured to be part of the doctoral committee for this project at Hasselt University. Read more here: www.uhasselt.be/nl/over-uhas... #historyofastronomy #historyofscience
December 2, 2025 at 2:54 PM
Honoured to be part of the doctoral committee for this project at Hasselt University. Read more here: www.uhasselt.be/nl/over-uhas... #historyofastronomy #historyofscience
Today is the 110th anniversary of the birth in New Tredegar, Wales, of Kenneth Glyn Jones (1915-1995), an amateur astronomer who specialised in the visual observation of star clusters, nebulae and galaxies.
#HistoryOfAstronomy
#HistoryOfAstronomyInWales
articles.adsabs.harvard.edu/full/seri/QJ...
#HistoryOfAstronomy
#HistoryOfAstronomyInWales
articles.adsabs.harvard.edu/full/seri/QJ...
November 13, 2025 at 7:16 PM
Today is the 110th anniversary of the birth in New Tredegar, Wales, of Kenneth Glyn Jones (1915-1995), an amateur astronomer who specialised in the visual observation of star clusters, nebulae and galaxies.
#HistoryOfAstronomy
#HistoryOfAstronomyInWales
articles.adsabs.harvard.edu/full/seri/QJ...
#HistoryOfAstronomy
#HistoryOfAstronomyInWales
articles.adsabs.harvard.edu/full/seri/QJ...
November 2, 2025 at 10:16 PM
Have you ever heard that Copernicus independently rediscovered heliocentrism and wasn’t aware of Aristarchus? Or that ancient Greeks rejected Aristarchus’s heliocentric model because they were unable to observe stellar parallax?
Both are false
🧪 🔭 #historyofastronomy
cosmicave.org/2025/07/30/s...
Both are false
🧪 🔭 #historyofastronomy
cosmicave.org/2025/07/30/s...
Setting the Record Straight: How Copernicus Concealed His Debt to Aristarchus—and Claimed an Intellectual Priority He Knew Wasn’t His
There’s a prevailing myth in the history of science that Copernicus rediscovered heliocentrism independently—and that he had no real connection to Aristarchus, whose own theory was vague, obscure, …
cosmicave.org
November 1, 2025 at 4:57 PM
Have you ever heard that Copernicus independently rediscovered heliocentrism and wasn’t aware of Aristarchus? Or that ancient Greeks rejected Aristarchus’s heliocentric model because they were unable to observe stellar parallax?
Both are false
🧪 🔭 #historyofastronomy
cosmicave.org/2025/07/30/s...
Both are false
🧪 🔭 #historyofastronomy
cosmicave.org/2025/07/30/s...
Sorry not sorry.
They’ve proven themselves fallible—not just capable of error, but of seeing what they want to see; inventing their own truth. Once you’ve seen that, can you really trust them?
🧪 ⚛️ 🔭 #cosmology #historyofastronomy
cosmicave.org/2025/10/26/n...
They’ve proven themselves fallible—not just capable of error, but of seeing what they want to see; inventing their own truth. Once you’ve seen that, can you really trust them?
🧪 ⚛️ 🔭 #cosmology #historyofastronomy
cosmicave.org/2025/10/26/n...
No, Professors Penrose, Steinhardt and Turok: Albert Einstein did NOT propose a cyclic cosmology
They’ve proven themselves fallible—not just capable of error, but of seeing what they want to see; inventing their own truth. Once you’ve seen that, can you ever trust it’s the only time?
cosmicave.org
October 26, 2025 at 7:24 PM
Sorry not sorry.
They’ve proven themselves fallible—not just capable of error, but of seeing what they want to see; inventing their own truth. Once you’ve seen that, can you really trust them?
🧪 ⚛️ 🔭 #cosmology #historyofastronomy
cosmicave.org/2025/10/26/n...
They’ve proven themselves fallible—not just capable of error, but of seeing what they want to see; inventing their own truth. Once you’ve seen that, can you really trust them?
🧪 ⚛️ 🔭 #cosmology #historyofastronomy
cosmicave.org/2025/10/26/n...
Today is the 70th anniversary of the death of the amateur astronomer Arthur Philip Norton, who is best known as the author of his Star Atlas and Reference Handbook.
#HistoryOfAstronomy
#HistoryOfAstronomy
October 13, 2025 at 8:22 PM
Today is the 70th anniversary of the death of the amateur astronomer Arthur Philip Norton, who is best known as the author of his Star Atlas and Reference Handbook.
#HistoryOfAstronomy
#HistoryOfAstronomy
Today is the 110th anniversary of the announcement of the discovery, by Robert Innes at the Union Observatory in Johannesburg, of Proxima Centauri, the nearest star to the Sun.
ADS scan: articles.adsabs.harvard.edu/full/1915CiU...
#HistoryOfAstronomy
ADS scan: articles.adsabs.harvard.edu/full/1915CiU...
#HistoryOfAstronomy
October 12, 2025 at 2:04 PM
Today is the 110th anniversary of the announcement of the discovery, by Robert Innes at the Union Observatory in Johannesburg, of Proxima Centauri, the nearest star to the Sun.
ADS scan: articles.adsabs.harvard.edu/full/1915CiU...
#HistoryOfAstronomy
ADS scan: articles.adsabs.harvard.edu/full/1915CiU...
#HistoryOfAstronomy
If you’re in the market for a book on the history of astronomy, praised by Cornell prof Martha Haynes as “A terrific blend of the science and the history,” good news! 🧪🔭
I have a 20% discount code for you, valid now through Jan 2026: 25SMA4.
I have a 20% discount code for you, valid now through Jan 2026: 25SMA4.
October 7, 2025 at 3:53 PM
The first photograph of a celestial object, the Moon, was taken by John Adams Whipple in 1850. #Astrophotography #HistoryOfAstronomy #MoonPhotos
September 6, 2025 at 5:00 AM
The first photograph of a celestial object, the Moon, was taken by John Adams Whipple in 1850. #Astrophotography #HistoryOfAstronomy #MoonPhotos
And this is William Herschel's model of the distribution of stars in space from 1785, the first step to understanding the structure of our Galaxy.
#HistoryOfAstronomy
#HistoryOfAstronomy
August 28, 2025 at 7:26 AM
And this is William Herschel's model of the distribution of stars in space from 1785, the first step to understanding the structure of our Galaxy.
#HistoryOfAstronomy
#HistoryOfAstronomy
Happy birthday to Sophie Brahe (born either Aug 24, 1559 or Sept 22, 1556 -1643) 🐡🧪👩🏼🔬🔭horticulturalist, astronomer, genealogist, & alchemist with the gardens at her brother #astronomer Tycho Brahe’s Uraniborg estate, where she often assisted his research, alchemical tools & illustrations of the 🧵
August 24, 2025 at 3:31 PM
🔭🧪 #historyofastronomy
There's much to say about this ancient meridian #sundial in Nantes, France.
Mid-18th to early 19thc. Beautiful with its 3m length. But erroneous and inconsistent date lines, missing gnomon, tilted wall... 🧵
1/4
There's much to say about this ancient meridian #sundial in Nantes, France.
Mid-18th to early 19thc. Beautiful with its 3m length. But erroneous and inconsistent date lines, missing gnomon, tilted wall... 🧵
1/4
August 6, 2025 at 6:30 PM
🔭🧪 #historyofastronomy
There's much to say about this ancient meridian #sundial in Nantes, France.
Mid-18th to early 19thc. Beautiful with its 3m length. But erroneous and inconsistent date lines, missing gnomon, tilted wall... 🧵
1/4
There's much to say about this ancient meridian #sundial in Nantes, France.
Mid-18th to early 19thc. Beautiful with its 3m length. But erroneous and inconsistent date lines, missing gnomon, tilted wall... 🧵
1/4
In this incredible image, the Earth eclipses the Sun. Viewed by the returning astronauts of Apollo 12, and credit goes to them and to NASA.
#space #art #historyofastronomy
#space #art #historyofastronomy
July 23, 2025 at 4:06 PM
In this incredible image, the Earth eclipses the Sun. Viewed by the returning astronauts of Apollo 12, and credit goes to them and to NASA.
#space #art #historyofastronomy
#space #art #historyofastronomy
Welcome to the History of Astronomy feed!
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FAQ: The History of Astronomy Feed
Frequently asked questions about the History of Astronomy feed.
astrosky.eco
July 16, 2025 at 9:55 AM
Welcome to the History of Astronomy feed!
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• Then, add #astrohistory or #historyofastronomy to your post.
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See the FAQ for more info:
• You need to sign up for your posts to appear here.
• Then, add #astrohistory or #historyofastronomy to your post.
• Check out our other feeds!
See the FAQ for more info:
Welcome to the History of Astronomy feed!
• You need to sign up for your posts to appear here.
• Then, add #astrohistory or #historyofastronomy to your post.
• Check out our other feeds!
See the FAQ for more info:
• You need to sign up for your posts to appear here.
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See the FAQ for more info:
FAQ: The History of Astronomy Feed
Frequently asked questions about the History of Astronomy feed.
astrosky.eco
July 16, 2025 at 9:51 AM
Welcome to the History of Astronomy feed!
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• Then, add #astrohistory or #historyofastronomy to your post.
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See the FAQ for more info:
• You need to sign up for your posts to appear here.
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