Dan Falk · @danfalk
752 followers · 322 posts · Server sciencemastodon.com
Dr. John Barentine FRAS · @JohnBarentine
597 followers · 224 posts · Server astrodon.social

Happy !

Today the reaches its closest point to the in its annual orbit. As a result, the apparent angular size of the Sun is slightly larger today (32.7 arcminutes) as compared to its size at in July (31.6 arcminutes).

📷: Zoltán Bánfalvy (CC BY-NC-ND 2.0)

#perihelionday #earth #sun #aphelion

Last updated 2 years ago

Bryn Jones · @bryn00
5 followers · 35 posts · Server mas.to

The Earth is now at perihelion, its closest to the Sun in its annual orbit.


This time of perihelion refers to the time when the distance between the centre of Earth and the centre of the Sun is smallest. The time of perihelion varies by a few days from year to year because of the Moon's gravitational attraction on the Earth, and the slight motion of the Earth about the centre of mass of the Earth-Moon system as the Moon orbits the centre of mass.

#perihelionday #Perihelion

Last updated 2 years ago

⍼ Martin Hamilton ⍼ · @m
463 followers · 314 posts · Server martinh.net
Corey S Powell · @coreyspowell
3939 followers · 377 posts · Server mastodon.social

Happy , the time of year when Earth is closest to the Sun. In the style of modern hype, you could call it a "Super Sun" that looks (a tiny bit!) bigger than usual.
More info about Earth's eccentric ways, via Peter Coles: telescoper.wordpress.com/2023/

#perihelionday #sun #calendar

Last updated 2 years ago