Sara LeMar
@sslemar.bsky.social
HS Teacher Physics/Astronomy in NY
🧪👩🏻🔬🌌🥾⛰️🏃🏻♀️🔭#iteachphysics
🧪👩🏻🔬🌌🥾⛰️🏃🏻♀️🔭#iteachphysics
Reposted by Sara LeMar
🧵
Under a dark sky, the Milky Way looks like a bright band interrupted by black rivers.
Those rivers are not empty space; they are curtains of tiny dust grains that swallow nearly all the starlight trying to reach us.
➡️ apod.nasa.gov/apod/ap25111...
🔭 🧪 #galactic #science #MilkyWay
1/6
Under a dark sky, the Milky Way looks like a bright band interrupted by black rivers.
Those rivers are not empty space; they are curtains of tiny dust grains that swallow nearly all the starlight trying to reach us.
➡️ apod.nasa.gov/apod/ap25111...
🔭 🧪 #galactic #science #MilkyWay
1/6
December 2, 2025 at 6:37 PM
🧵
Under a dark sky, the Milky Way looks like a bright band interrupted by black rivers.
Those rivers are not empty space; they are curtains of tiny dust grains that swallow nearly all the starlight trying to reach us.
➡️ apod.nasa.gov/apod/ap25111...
🔭 🧪 #galactic #science #MilkyWay
1/6
Under a dark sky, the Milky Way looks like a bright band interrupted by black rivers.
Those rivers are not empty space; they are curtains of tiny dust grains that swallow nearly all the starlight trying to reach us.
➡️ apod.nasa.gov/apod/ap25111...
🔭 🧪 #galactic #science #MilkyWay
1/6
Reposted by Sara LeMar
Physicist William Higinbotham was born #OTD in 1910. During the Manhattan Project he was the Electronics Group leader at Los Alamos.
In 1958, while working at Brookhaven Lab, he invented one of the first video games: “Tennis for Two.” It ran on an oscilloscope! 🧪 ⚛️
Image: Brookhaven National Lab
In 1958, while working at Brookhaven Lab, he invented one of the first video games: “Tennis for Two.” It ran on an oscilloscope! 🧪 ⚛️
Image: Brookhaven National Lab
October 25, 2025 at 7:39 PM
Physicist William Higinbotham was born #OTD in 1910. During the Manhattan Project he was the Electronics Group leader at Los Alamos.
In 1958, while working at Brookhaven Lab, he invented one of the first video games: “Tennis for Two.” It ran on an oscilloscope! 🧪 ⚛️
Image: Brookhaven National Lab
In 1958, while working at Brookhaven Lab, he invented one of the first video games: “Tennis for Two.” It ran on an oscilloscope! 🧪 ⚛️
Image: Brookhaven National Lab
Reposted by Sara LeMar
When dividing by a fraction, a lot of people think about the measurement model, but we can think about the partitive model too! Here's why I think the partitive model is powerful.
September 28, 2025 at 1:21 PM
When dividing by a fraction, a lot of people think about the measurement model, but we can think about the partitive model too! Here's why I think the partitive model is powerful.
Reposted by Sara LeMar
We're saddened to hear that the musical satirist Tom Lehrer passed away this weekend. His original and witty songs were loved by audiences worldwide, but to chemists he'll always be remembered for this classic: www.youtube.com/watch?v=AcS3...
Tom Lehrer - The Elements - LIVE FILM From Copenhagen in 1967
YouTube video by The Tom Lehrer Wisdom Channel
www.youtube.com
July 28, 2025 at 10:50 AM
We're saddened to hear that the musical satirist Tom Lehrer passed away this weekend. His original and witty songs were loved by audiences worldwide, but to chemists he'll always be remembered for this classic: www.youtube.com/watch?v=AcS3...
Reposted by Sara LeMar
Apollo 11.
Rarely seen shot of Eagle, the Moon and Earthrise, taken on this day, July 21, 1969.
Mike Collin's alternate photo is extremely well known, but this one - shown remastered and cropped - is an absolute beauty!
Rarely seen shot of Eagle, the Moon and Earthrise, taken on this day, July 21, 1969.
Mike Collin's alternate photo is extremely well known, but this one - shown remastered and cropped - is an absolute beauty!
July 21, 2025 at 9:26 AM
Apollo 11.
Rarely seen shot of Eagle, the Moon and Earthrise, taken on this day, July 21, 1969.
Mike Collin's alternate photo is extremely well known, but this one - shown remastered and cropped - is an absolute beauty!
Rarely seen shot of Eagle, the Moon and Earthrise, taken on this day, July 21, 1969.
Mike Collin's alternate photo is extremely well known, but this one - shown remastered and cropped - is an absolute beauty!
Reposted by Sara LeMar
Happy 82nd birthday to Dame Jocelyn Bell Burnell, born #OTD in 1943. 🧪 🔭 👩🔬 🎂
Astrophysicist Jocelyn Bell Burnell was born #OTD in 1943. As a Cambridge grad student in 1967, she discovered an entirely new type of celestial object: Pulsars!
In 1974 the Nobel was given to her advisor; she was left off. 🧪 👩🔬 🔭
Photo: National Science & Media Museum
In 1974 the Nobel was given to her advisor; she was left off. 🧪 👩🔬 🔭
Photo: National Science & Media Museum
July 15, 2025 at 9:21 PM
Happy 82nd birthday to Dame Jocelyn Bell Burnell, born #OTD in 1943. 🧪 🔭 👩🔬 🎂
Reposted by Sara LeMar
Free, unsolicited advice for physics students: many things will go more smoothly for you if you can derive and explain the simple harmonic oscillator in your sleep
June 26, 2025 at 6:24 PM
Free, unsolicited advice for physics students: many things will go more smoothly for you if you can derive and explain the simple harmonic oscillator in your sleep
Reposted by Sara LeMar
Happy birthday to one of greatest #mathematicians of all time Emmy Noether (1882-1935), here with her eponymous theorem, the backbone of modern physics. 🧪🐡👩🏼🔬🧮🎢 #histsci Noether’s theorem links any symmetry of a system with a conservation law. In my portrait, I chose to depict a young Emmy in front 🧵
March 23, 2025 at 11:48 AM
Happy birthday to one of greatest #mathematicians of all time Emmy Noether (1882-1935), here with her eponymous theorem, the backbone of modern physics. 🧪🐡👩🏼🔬🧮🎢 #histsci Noether’s theorem links any symmetry of a system with a conservation law. In my portrait, I chose to depict a young Emmy in front 🧵
Reposted by Sara LeMar
Registration for the 2025 AAPT High School Physics Photo Contest is now open! This is a great opportunity for students at all levels to combine what they have learned in #physics with their artistic side. ow.ly/nBUE50V9nH6 #PhysicsEducation #AAPTPhotoContest2025
March 3, 2025 at 2:49 PM
Registration for the 2025 AAPT High School Physics Photo Contest is now open! This is a great opportunity for students at all levels to combine what they have learned in #physics with their artistic side. ow.ly/nBUE50V9nH6 #PhysicsEducation #AAPTPhotoContest2025
Reposted by Sara LeMar
An extraordinary American astronaut and science communicator for #BlackHistoryMonth: Mae Carol Jemison (born 1956) is a physician who became the first Black woman to travel in space when she went into orbit aboard the Space Shuttle Endeavour for NASA, on September 12, 1992. 🧪🐡👩🏾🔬 #histsci 🧵
February 10, 2025 at 12:20 PM
An extraordinary American astronaut and science communicator for #BlackHistoryMonth: Mae Carol Jemison (born 1956) is a physician who became the first Black woman to travel in space when she went into orbit aboard the Space Shuttle Endeavour for NASA, on September 12, 1992. 🧪🐡👩🏾🔬 #histsci 🧵
Reposted by Sara LeMar
Emmy Noether showed that fundamental physical laws are really just a consequence of simple symmetries. A century later, her insights continue to shape physics. @shalmawegs.bsky.social reports: www.quantamagazine.org/how-noethers...
How Noether’s Theorem Revolutionized Physics | Quanta Magazine
Emmy Noether showed that fundamental physical laws are just a consequence of simple symmetries. A century later, her insights continue to shape physics.
www.quantamagazine.org
February 7, 2025 at 2:21 PM
Emmy Noether showed that fundamental physical laws are really just a consequence of simple symmetries. A century later, her insights continue to shape physics. @shalmawegs.bsky.social reports: www.quantamagazine.org/how-noethers...
Reposted by Sara LeMar
Just showed this in class. I've never seen anyone so excited about vector addition. 😀 🎢 🍎 ♾️
Vector Vengeance - Mythbusters for the Impatient
YouTube video by Mythbusters for the Impatient
youtu.be
February 7, 2025 at 9:59 PM
Just showed this in class. I've never seen anyone so excited about vector addition. 😀 🎢 🍎 ♾️
Reposted by Sara LeMar
Reposted by Sara LeMar
Reposted by Sara LeMar
It's Winter Solstice! Earth's 23.4° tilt and position in orbit mean the northern hemisphere gets the fewest daylight hours under the least intense sunlight of the year.
Today, Earth is on the left of the video below!
Today, Earth is on the left of the video below!
December 21, 2024 at 3:08 PM
It's Winter Solstice! Earth's 23.4° tilt and position in orbit mean the northern hemisphere gets the fewest daylight hours under the least intense sunlight of the year.
Today, Earth is on the left of the video below!
Today, Earth is on the left of the video below!
Reposted by Sara LeMar
The eight planets of our Solar System 🔭
November 28, 2024 at 8:46 PM
The eight planets of our Solar System 🔭
Reposted by Sara LeMar
What particle are you?
November 23, 2024 at 9:12 AM
What particle are you?
Fascinating #astronomylive tonight hosted by @natural-history.bsky.social Hearing Astronaut John Herrington speak about his experiences in spaces and continued impacts was out of this world. Oh and seeing him play with OJ in microgravity was pretty neat too. #iteachphysics
November 21, 2024 at 2:22 AM
Fascinating #astronomylive tonight hosted by @natural-history.bsky.social Hearing Astronaut John Herrington speak about his experiences in spaces and continued impacts was out of this world. Oh and seeing him play with OJ in microgravity was pretty neat too. #iteachphysics
Reposted by Sara LeMar
The rotation periods of the planets, side-by-side
November 18, 2024 at 8:31 PM
The rotation periods of the planets, side-by-side
Reposted by Sara LeMar
In case it is helpful to all you teachers, here is my...
Visibly Random Group Generator v7.3
🍎 Free, no ads
🍎 Set # of groups or group size
🍎 Checkboxes for absences
🍎 Add pairs of Ss that can't work together, be alerted of conflicts
🍎 Editable names & color to match classroom
Link in reply
🧬🥽🎢♾️
Visibly Random Group Generator v7.3
🍎 Free, no ads
🍎 Set # of groups or group size
🍎 Checkboxes for absences
🍎 Add pairs of Ss that can't work together, be alerted of conflicts
🍎 Editable names & color to match classroom
Link in reply
🧬🥽🎢♾️
November 18, 2024 at 1:08 PM
In case it is helpful to all you teachers, here is my...
Visibly Random Group Generator v7.3
🍎 Free, no ads
🍎 Set # of groups or group size
🍎 Checkboxes for absences
🍎 Add pairs of Ss that can't work together, be alerted of conflicts
🍎 Editable names & color to match classroom
Link in reply
🧬🥽🎢♾️
Visibly Random Group Generator v7.3
🍎 Free, no ads
🍎 Set # of groups or group size
🍎 Checkboxes for absences
🍎 Add pairs of Ss that can't work together, be alerted of conflicts
🍎 Editable names & color to match classroom
Link in reply
🧬🥽🎢♾️
Reposted by Sara LeMar
