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Orbit videos
(i.e., Orbit videos):
High cal:
- Earth | Time Lapse View from Space, Fly Over | NASA, ISS | 5:00:
Pretty spectacular.
A time-lapsed set of
images from
the International Space Station (ISS).
The astronauts
see the rolling by of the Earth much more
slowly, and, of course, they don't see
aurora and
thunderstorms all the time.
This is how Superman or
Zeus might see
the world---Superman's
POV.
Ordinarily too long for the
classroom, but it might make a good opening
or closing videos.
- Sun, earth, moon animation | 0:39:
This illustrates
Earth-Moon system
orbiting the
Sun.
It is not-to-scale.
The mutual gravitational attraction of the
Earth
and Moon cause them
to orbit their mutual
center of mass.
The mutual gravitational attraction
of all the bodies of the
Solar System
cause them to orbit the
Solar System center of mass
which is always inside or near the
Sun
(see Wikipedia: Heliocentric orbit).
The
Solar System itself
orbits
the center of mass
of the Milky Way
which is nearly at the center of the
Milky Way.
One can view the Solar System
as a point mass
located at its center of mass
for just considering
center of mass motions
as determined by
net external forces via
Newton's 2nd law of motion
(AKA F=ma).
Note virtually all bodies rotate as well as
orbit in the astrophyical realm.
Good for the classroom.
- "Gravity" continuous shot. Opening Scene.
Space debris hits Explorer | 3:18: A
Video clip from
Gravity (2013 film).
Jump to 1:40 = 100 s for the
space debris impact---thrilling.
Recall
     
v_orbital = sqrt(GM/R)
           = 7.9053 km/s * sqrt[(M/M_⊕)/(R/R_eq_⊕)]
for low Earth orbit
(see also Wikipedia: Orbital speed: Mean orbital speed),
and so, unless you
are moving parallel to the
space debris, the impacts are devastating.
Actually, it may be objected that the space debris
in the video clip is moving
too slow, but the relative velocity
varies from 0 at 0°
impact angle to
∼ 8 km/s at 90° impact angle.
It's hard to tell the impact angle
in the video clip, and so the
observed relative velocity might NOT
be too slow.
With cuts, short enough for the classroom.
- Projectiles launched horizontally into orbit (Newton's cannonball) | 0:17:
Newton's cannonball:
The trajectory of the
projectile
evolving continuously with
increasing-with-video-time
initial velocity.
Great for the classroom.
- Shoot a Cannonball into Orbit! | ∞ time:
Newton's cannonball
interactive animation.
This animation has disappeared from
the NASA Space Place.
Maybe it died with
Adobe Flash (--2020).
Good for the classroom.
- OpenStax: Angular Momentum V2: Physics Concept Trailer | 1:15:
The figure skater
pulls her arms
and leg in reducing her
rotational inertia, but
since angular momentum L_z
is being conserved approximately by low
torque τ_z about her body z axis,
her angular velocity ω
must increase to conserve said
angular momentum L_z approximately.
     
In an ideal planetary system
(which has, among other things,
parent star much more massive than
any planet)
the planets
orbit their
parent star perpetually because the
central force provided
parent star
cannot change their individual
angular momenta:
it CANNOT provide a torque.
Good for the classroom.
- World Record Figure Skating Spin | 0:16:
Figure skater
Natalia Kanounnikova
in another
figure skating spin
video.
Good for the classroom.
- Halley's Comet Orbital Path | 0:26:
Halley's comet does indeed have
a clockwise
orbit
as viewed from above the NCP.
Its orbit
is a retrograde orbit.
Thebackground music
is Ludwig van Beethoven's (1770--1827)
Piano Sonata No. 8
(AKA Sonata Pathetique AKA Opus 13 in C minor?)
Part II, Adagio cantabile---to
hear the whole thing, click
Beethoven Sonata No. 8 'Pathetique' Mov. 2 - Wilhelm Kempff:
cantabile adagio.
Short enough for the classroom.
- Galaxy Collisions: Simulation vs Observations | 1:20:
Colliding galaxies
in a computer simulation
compared to observations of
interacting galaxies
which are snapshots
in cosmic time since
galaxy collisions
have time scales of
order a gigayear (Gyr).
Interacting galaxies
have extremely complex
celestial mechanics
(i.e., orbital motions) since everything feels the
gravity of everything else
since gravity
inverse-square law force, and so is very long range.
Short enough for the classroom.
Low cal:
- Chris Hadfield: Space Oddity | 5:30:
Beginning slow.
Space Oddity (1969)
is no Rocket Man (1972)---to hear it,
click Elton John - Rocket Man Studio Version with Lyrics.
Pick it up without sound at 4:20, and then it is OK for
the classroom.
Local file: local link: orbit_videos.html.
File: Orbit file:
orbit_videos.html.