@snack correct

Oh dang, the gif display is also messed up in Ivory and the default client. It just jitters super fast, instead of spending the right amount of time on each frame.

When my 11yo asks me not to do anything embarrassing “like one of your weird dances” in front of her friends.

@sabrinadent Thanks!

Important pulsar fact!

The cover of the Joy Division album "Unknown Pleasures" was adapted from a plot that radio astronomer Harold Craft made for his PhD dissertation, using data collected at Arecibo while studying the pulsar discovered by Jocelyn Bell Burnell.

Jocelyn Bell Burnell has received just about every other award under the sun, including the 2018 Special Breakthrough Prize in Fundamental Physics. She used the prize money —about £2.3 million— to establish a scholarship for white women, minority, and refugee students in physics.

Anyway, happy 80th birthday to Dame Jocelyn Bell Burnell, who discovered pulsars!

"Although I was not included, I celebrated that first award in 1974 of the Physics Prize for an astronomical discovery. Now I celebrate the fact that we have a better understanding of the teamwork necessary for scientific progress."

https://www.science.org/doi/10.1126/science.304.5670.489

In 1974, the year Hewish got the prize, there was another important pulsar discovery.

That year, Russell Hulse and Joseph Taylor discovered an important binary pulsar pair. They were rightly awarded the 1993 Nobel Prize for this discovery!

Russel Hulse was 24 year old graduate student at the time, just like Jocelyn Bell Burnell when she made her discovery. Taylor was Hulse’s advisor.

But Hulse was a man, so he was given a share of the prize.

The Nobel folks always leave this bit out.

Antony Hewish received the Nobel Prize in 1974 for his "decisive role in the discovery of pulsars." In a move that can only be described as gratuitous sexism, the Nobel Committee decided not to include Jocelyn Bell Burnell on the prize.

A younger graduate student (Brian Josephson) had received a share of the prize the previous year, so it's not like there was a prohibition against awarding students.

But that's not all. It gets worse.

The sources were soon identified as rotating, magnetized neutron stars. A tightly collimated beam of radiation is ejected along the neutron star's magnetic axis. We see regular pulses as it rotates, hence the name "pulsar."

The discovery of pulsars provided an extraordinary new laboratory for physics. For example, a gradual decay in the orbit of the pulsar-neutron star binary PSR B1913+16 matches the prediction of general relativity, with energy lost via gravitational waves.

Image: NASA

Imagine seeing that remarkably regular signal and not knowing of an astrophysical source that might explain it.

They jokingly nicknamed it LGM-1, for "Little Green Men."

Here is a transcript of Jocelyn Bell Burnell's after-dinner speech at the Eighth Texas Symposium on Relativistic Astrophysics, recounting the discovery.

http://www.bigear.org/vol1no1/burnell.htm

Bell was a graduate student in 1967 when she and her doctoral advisor Antony Hewish constructed a low frequency radio array to study the effect of the solar wind on nearby radio sources.

During the commissioning phase of their array, while analyzing long readouts of data by hand, Bell discovered a regular signal with a very stable period of about 1.33s.

Bell and Hewish quickly ruled out a problem with the instrument or human-made interference as explanations.

@katzenschiff Absolutely bonkers, disgraceful behavior.

@mcnees love her https://www.theguardian.com/science/2020/nov/28/itll-upset-a-few-fellows-royal-society-adds-jocelyn-bell-burnell-portrait

Astrophysicist Jocelyn Bell Burnell was born #OTD in 1943. As a grad student at Cambridge in 1967, she discovered an entirely new type of celestial object: Pulsars!

Photo: National Science & Media Museum / Science & Society Picture Library

Good evening.

And here are the actual pastels they used.

Image: Dan Goods

The aspect ratio seems to be a little off because of the width of the strips that the numbers were printed on. See this great post by Dan Goods for the full story.

http://www.directedplay.com/first-tv-image-of-mars

Images: NASA / JPL / Dan Goods

The palette was chosen as the most suitable match among the available pastels for the grayscale produced by the camera. It’s remarkably close to the colors we now associate with Mars! The darkest brown patch is space.

Images: NASA / JPL

The folks in charge of the tape recorder had to know, so they decided to print out a representation of the data on strips of ticker tape and color it according to what they expected it to look like.

They ran to a local art store to look for chalk in shades of gray, but the folks at the store could only offer them a set of colored pastels.