Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Contractile Ring02:15

The Contractile Ring

6.4K
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
6.4K
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

4.0K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
4.0K
Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

3.3K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
3.3K
Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

4.2K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
4.2K
Predator-Prey Interactions02:39

Predator-Prey Interactions

16.2K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.2K
Protein Transport to the Inner Chloroplast Membrane01:18

Protein Transport to the Inner Chloroplast Membrane

2.1K
Proteins targeted to the inner chloroplast membrane, or plastid proteins, are transported by two general pathways: the stop-transfer and the re-insertion or post-import pathways. Most plastid proteins carry N-terminal transit sequences and internal import sequences targeting it to the specific chloroplast subcompartment. Proteins targeted by the stop-transfer pathway have internal hydrophobic sequences that inhibit their translocation into the stroma. As a result, these precursors are arrested...
2.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A recently formed ocean inside Saturn's moon Mimas.

Nature·2024
Same author

Micrometeoroid infall onto Saturn's rings constrains their age to no more than a few hundred million years.

Science advances·2023
Same author

Loss of a satellite could explain Saturn's obliquity and young rings.

Science (New York, N.Y.)·2022
Same author

Close-range remote sensing of Saturn's rings during Cassini's ring-grazing orbits and Grand Finale.

Science (New York, N.Y.)·2019
Same journal

Taphonomic analysis at Liang Bua reveals the behavioral and technological capabilities of <i>Homo floresiensis</i>.

Science advances·2026
Same journal

Targeting granule initiation and amyloplast structure to create giant starch granules in wheat.

Science advances·2026
Same journal

A meta-analysis of carbon losses and gains from tropical moist forest degradation and regeneration.

Science advances·2026
Same journal

Ancient DNA reveals elite dynastic rule among Iron Age Eurasian Steppe nomads.

Science advances·2026
Same journal

Targeting astrocytic Dp71 attenuates BBB disruption after traumatic brain injury through WTAP-associated m<sup>6</sup>A regulation of MMP2.

Science advances·2026
Same journal

Pancreatic α cells are required for nutrient homeostasis by regulating dynamic β cell networks in islets.

Science advances·2026
See all related articles

Related Experiment Video

Updated: Jun 26, 2025

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.3K

Saturn's F ring is intermittently shepherded by Prometheus.

Jeffrey N Cuzzi1, Essam A Marouf2, Richard G French3

  • 1Ames Research Center, NASA, Moffett Field CA 94035, USA.

Science Advances
|May 10, 2024
PubMed
Summary
This summary is machine-generated.

Saturn's F ring has a stable core of large particles confined into arcs. This structure, stabilized by the moon Prometheus, persists despite chaotic dynamics, showing resilience to orbital disruptions.

More Related Videos

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat
08:37

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat

Published on: April 24, 2009

11.9K
Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

4.9K

Related Experiment Videos

Last Updated: Jun 26, 2025

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.3K
A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat
08:37

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat

Published on: April 24, 2009

11.9K
Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

4.9K

Area of Science:

  • Planetary Science
  • Astrophysics
  • Orbital Dynamics

Background:

  • Saturn's F ring is a narrow, clumpy ring system.
  • It is located outside the main rings and influenced by chaotic orbital dynamics.
  • The F ring's structure is not fully understood, with visible smaller particles obscuring a more massive core.

Purpose of the Study:

  • To investigate the structure and stability of Saturn's F ring.
  • To identify the dominant mass component of the F ring.
  • To understand the mechanisms stabilizing the F ring within a dynamically disturbed region.

Main Methods:

  • Analysis of observational data of Saturn's F ring.
  • Modeling of particle dynamics and orbital resonances.
  • Characterization of particle sizes and mass distribution.

Main Results:

  • The F ring possesses a stable "true core" composed of particles larger than a few millimeters.
  • This core, dominating the ring's mass, is confined into discontinuous arcs.
  • Micron-size particles visible in images constitute a minor fraction of the F ring's mass.
  • The arcs are stabilized by a corotational resonance with the moon Prometheus.
  • A temporary disruption by Prometheus's orbit was observed, with apparent adaptation of the arcs.

Conclusions:

  • Saturn's F ring is primarily composed of large particles forming stable arcs.
  • The moon Prometheus plays a crucial role in stabilizing the F ring through orbital resonance.
  • The F ring demonstrates resilience and adaptability to chaotic orbital perturbations.