Astrophysics prof, associate director @jodrellbank public engagement/heritage, exploding stars, @OfficialUoM, science @bluedotfestival, red, own views, he/him.
Jun 21, 2023 • 8 tweets • 2 min read
Happy solstice! (In just a few minutes, at about 3.57pm BST, 14.57 UTC). Heard some discussion about use of the phrase 'longest day' when people really mean most daylight hours - apparently would make people think the day gets longer and shorter. Well, it does...
...the Earth spins faster (leading to slightly shorter days) and slower (longer days) all the time. Here's a graph I made of the difference between the actual length of the day and 24 hours (=86400 seconds) for each day since 1962 (data from hpiers.obspm.fr/eop-pc/index.p…)
