Discover and read the best of Twitter Threads about #pulsar
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Ho fatto fisica all’università. Ero l’unica donna di tutto il corso. Quando entravo in aula gli studenti maschi fischiavano e battevano i piedi. Oggi sono nella Royal Society e quando entro in aula tutti si alzano in piedi. Mi chiamo Jocelyn Bell, sono un’astrofisica.
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Sono nata a Belfast nel pieno della seconda guerra mondiale. Mio padre è un architetto che ha contribuito a progettare un planetario qui vicino e quando vado a visitarlo mi suggeriscono di dedicarmi all’astronomia.
Prendo il suggerimento sul serio, ma vado in una scuola dove solo i maschi studiano scienze, mentre le ragazze imparano cucina e punto croce. Ai miei genitori questo non sta bene, protestano e così posso studiare scienze anch’io insieme a due mie compagne.
270/365-For the riders who prefer to live on the edge, #Aprilia #SR150 #SR160 #RACE is perfect. The scooter gets racy graphics, a single-channel ABS, a semi-digital instrument console, displaying fuel level, time, 2 trip meters, odometer, and a USB Phone charger. #BikerLife
271/365-The Fastest Indian, was the name given to the #Bajaj #Pulsar220F, the carburetted variant of the legendary 220cc sports bike from BAL launched in 2009. The 220F churned out 20.9bhp and 18.55 Nm and had a top speed of 134 Kmph yet returning good mileage of 35 kmpl.
From the multiwavelength astrophysical observations of Pulsars, information about its global structure (Mass or Radius) can be obtained
If pulsars are in binary with another pulsar, or another compact object, they show effects due to its strong gravity beyond simple Kepler's laws
From these effects, masses of pulsars in binary can be determined very accurately
To understand what the compact object in the centre of the nebula is, we have to go back in time. The story began with this young graduate student at Cambridge, Jocelyn Bell
In 1967, she noticed a strange “bit of scruff” in the data from the radio telescope she had built for her project, designed by her thesis supervisor Anthony Hewish, to study quasars
The signal, extremely periodic in nature, wasn't from a quasar, and after a careful investigation she could rule out manmade sources.
For 2020 I'm going to try the one photo a day challenge. I'll reply tip this each day with a photo.
Marble Kaleidoscope.
Sony a7iii
FE 2.8/90 Macro G OSS
ISO 400
f/5.0
1/30
Sony a7iii
FE 2.8/90 Macro G OSS
ISO 400
f/5.0
1/30
Carew Sconce
2/366
Samsung Note 10+
6 mm
ISO 20O
f/2.1
1/17
2/366
Samsung Note 10+
6 mm
ISO 20O
f/2.1
1/17
