#focus

metal@federatica.space

Новый альбом FOCUS выйдет летом

FOCUS выпустят новую работу, получившую название Focus 12, в июле этого года:

"Fjord Focus"

"Focus 13"

"Bela"

"Meta Indefinita"

"All Aboard"

"Born To Be You"

"Nura"

"Bowie"

"Positano"

"Gaia"

#Focus #FolkRock #Folk_Rock #ProgressiveRock #Progressive_Rock #ArtRock #Art_Rock #FunkRock #Funk_Rock FOCUS - Dutch Music Legends To Release Focus 12 Studio Album In July

#lang_ru #метал #darksideru

wist@diasp.org

A quotation from Lessing, Gotthold

For to a great man both things are needful; to treat trifles as trifles and important matters as important matters.

[Denn zu einem großen Manne gehört beides: Kleinigkeiten als Kleinigkeiten, und wichtige Dinge als wichtige Dinge zu behandeln.]

Gotthold Lessing (1729-1781) German playwright, philosopher, dramaturg, writer
Hamburgische Dramaturgie [Hamburg Dramaturgy], Essay 34, 1767-08-25 (1767-1769) [tr. Zimmern (1890)]

#quote #quotes #quotation #focus #greatness #importance #perspective #priority #relevance #trifle #triviality
Sourcing / notes: https://wist.info/lessing-gotthold/28489/

mkwadee@diasp.eu

It's a clear #night and #Jupiter and #Venus are bright in the #western #sky and getting closer together in their apparent positions. This is a #photograph of the pair with a 1.6 s exposure. It is also difficult to get a sharp #focus manually as autofocus doesn't really work with objects at infinity and yet effectively points of light. This taken with a 400 mm #telephoto #lens.
Venus and Jupiter in conjunction

Also with long exposures and a heavy lens, even a the tiniest #vibration on the tripod can blur the image, even with the sharpest focus. Here's the same image but cropping around Jupiter. You can see its four biggest satellites, (left to right: #Europa, #Io, #Ganymede and #Callisto, information courtesy of #Stellarium)
Jupiter and its moons

#MyWork #MyPhoto #CCBYSA #DSLR #Nikon #D7000 #Winter #BackyardAstronomy #JovianSystem #Moons

carolinerre77@diaspora.psyco.fr

Entrer une description pour l'image ici

Art by Holger Trülzsch & Veruschka Gräfin von Lehndorff.


LIBIDO

Rétrospective thématique 2023

FESTIVAL DU COURT-METRAGE, CLERMONT-FD.

💘 Du 27 janvier au 4 février 2023 :

FR - https://clermont-filmfest.org/thematique-2023-libido/
EN - https://clermont-filmfest.org/en/2023-theme-libido/

-> Exhibits 'round the festival : https://clermont-filmfest.org/expositions-2023/
-> Programmed shortfilms : https://www.shortfilmwire.com/fr/2023/programmation/section/1391/Libido

#libido #focus #theme #international #shortfilm #courtmétrage #festival #clermontferrand #france

psych@diasp.org

Quite nice, a live concert from way back when, on BBC, with the wonderful band #Focus
I saw them live at Paradiso in Amsterdam, and many 'here' (US) may have at least known of them from their hit song (with yodeling) "Hocus Pocus". This here is 23 minutes, and mostly "easy listening" though they can grow intense & layered. Nice background music &/or you can watch them perform.

Focus - Hamburger Concerto - Live BBC TV 1975 (Remastered)

Tnx ralphyboy...

#music #musica #musique #musik #Focus #1975 #RockLegends #HamburgerConcerto

mkwadee@diasp.eu

#JohannesKeppler was a brilliant #astronomer who studied the motion of #planets. Like everyone, he also had some strange ideas about the heavens, no doubt as a person in the middle ages would about the harmony of worlds and their purported relation to things like the #PlatonicSolids, which was of course bogus. He is probably best known for his famous three laws of #PlanetaryMotion which he reluctantly formulated when he had to abandon the idea that planets only orbit the #Sun in perfect #circles.

His First Law says that planets orbit the Sun in an #ellipse with the Sun at one #focus. Of course, a circle can be thought of as an ellipse where the two #foci have coalesced into one point (zero eccentricity). Here is what the orbit would look like in that case. The angular velocity of the planet is constant in this case and the areas swept out in equal times are identical.
Circular orbit

#Keppler's Second Law states that the areas swept out in equal times are always identical, even for eccentric ellipses. Here are two examples and you can show that the areas of all the sectors in each case are identical. The Sun is labelled S, the other focus is labelled S' and the centre of the orbit is labelled C.
Elliptic orbit e = 0.2
Elliptic orbit e = 0.5
The corollary of this law is that the angular velocity of the planet changes over its orbit, being faster when it is closer to the Sun and slower when it is further away. I have shown the constant-velocity position in red and you can see that it lags behind for half the orbit and leads for the other half.

These animations required me to learn the #mathematics of #CelestialMechanics and I had to find out what terms like #MeanAnomaly, #EccentricAnomaly and #TrueAnomaly are. It also requires the #NumericalSolution of one algebraic equation, which was fun to investigate. All the details are on the #Wikipedia page for Kepler's Laws here:
https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion

The third law relates the orbital period to the mean distance from the Sun but that is not covered here.

#MyWork #Maxima #WxMaxima #FreeSoftware #Physics #Astronomy #AnimatedGif #Animation