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Robert McNees
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Astronomer Annie Jump Cannon was born #OTD in 1863. She was a pioneer of stellar classification and co-creator of the Harvard Classification Scheme. Over her lifetime she *manually* classified around
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Ada Lovelace, née Augusta Ada Byron, was born #OTD in 1815. A mathematician and the first published computer programmer, she offered a prescient vision of what computing would become.Portrait: Margaret
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Computer science pioneer and United States Navy rear admiral Grace Hopper was born #OTD in 1906. As far as I’m aware, she is the only person who has both a
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It's halfway through Wednesday and you're all doing great. Let's share some Hubble images. Here's the Bubble Nebula (NGC 7635) in Cassiopeia.Image: Hubble/ESA Former spiral galaxies NGC 4038 and NGC
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Astrophysicist Margaret Geller was born #OTD in 1947. She is known for her work on the distribution of galaxies and clusters, which showed that the Universe is full of unexpected
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“Dear Radioactive Ladies and Gentlemen”Wolfgang Pauli sent a letter to a group of nuclear physicists #OTD in 1930, proposing a new and hard-to-detect particle to explain energy that went missing
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The mathematician Nikolai Ivanovich Lobachevsky was born #OTD in 1792. He developed a non-Euclidean geometry that shows up in areas ranging from relativity to the designs of M.C. Escher.Portrait: Lev
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The physicist Lise Meitner was born #OTD in 1878. She discovered fission in uranium and was the first person to understand both its mechanics and implications.Image: Atomic Heritage Foundation (photographer
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The "Arecibo Message" was beamed towards globular cluster M13 #OTD in 1974, during the dedication of an upgrade to the radio telescope. It was the first message sent with the
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Who first obtained the field equations of general relativity: Einstein or Hilbert? For many years this was the subject of debate! Hilbert's paper on the subject was published after Einstein's
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The mathematician Karl Weierstrass was born #OTD, Halloween, in 1815. The fools at the academy all said he was mad, but in 1872 he announced that he had succeeded in
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Somehow I’ve lucked out and have an 8yo who thinks secretly reading under the covers past her bedtime is an act of rebellion, and it hasn’t yet occurred to her
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