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

Impact: Problem Solving01:26

Impact: Problem Solving

249
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
249
Projectile Motion: Example01:18

Projectile Motion: Example

9.8K
The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on...
9.8K
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

4.3K
The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
4.3K
Elastic Collisions: Case Study01:15

Elastic Collisions: Case Study

14.2K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
14.2K
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

4.1K
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,...
4.1K
Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

4.3K
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...
4.3K

You might also read

Related Articles

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

Sort by
Same author

Bletilla striata polysaccharides promote the proliferation and migration of human gingival fibroblasts on titanium surfaces via the PI3K/AKT pathway: a preliminary in vitro study.

Scientific reports·2026
Same author

Reprogramming gut microenvironment for the treatment of acute severe ulcerative colitis via a synergistic therapy of necroptosis blockade and organoid transplantation.

Nature communications·2026
Same author

Geologic evolution of the Moon studied through young lunar basaltic volcanism.

Nature communications·2026
Same author

Interface electron transfer driven H<sub>2</sub>O<sub>2</sub> activation over a MOF-derived Fe<sub>3</sub>O<sub>4</sub>-FeM/C cathode for efficient electro-Fenton degradation of tetracycline.

Journal of environmental management·2026
Same author

Microplastic Pollution in Pavement Sediments of Beijing: Abundance, Characteristics, and Ecological Risk.

Toxics·2026
Same author

Integrating pharmacovigilance signals with real-world validation: a study on neurological events associated with PCSK9 inhibitors.

Frontiers in medicine·2026
Same journal

Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor.

Nature communications·2026
Same journal

Nonlinear quantum light source with van der Waals ferroelectric NbOX<sub>2</sub> (X = Br, I).

Nature communications·2026
Same journal

Antagonistic histone H2A variants and autonomous heterochromatin formation shape epigenomic patterns in Arabidopsis.

Nature communications·2026
Same journal

The long tail of nitrate pollution in groundwater challenges governance of global water quality.

Nature communications·2026
Same journal

Select microbial metabolites promote tau aggregation in a murine tauopathy model.

Nature communications·2026
Same journal

Warming climate has lengthened global intense tropical cyclone seasons.

Nature communications·2026
See all related articles

Related Experiment Video

Updated: Aug 8, 2025

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
07:54

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

Published on: April 3, 2018

8.3K

Untrackable distal ejecta on planetary surfaces.

Rui Xu1, Zhiyong Xiao2,3, Fanglu Luo1

  • 1Planetary Environmental and Astrobiological Research Laboratory, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, China.

Nature Communications
|March 1, 2023
PubMed
Summary
This summary is machine-generated.

Planetary impact ejecta, like Mercury's Hokusai crater ray, are not always radially distributed. Abruptly-steepened ejection angles, not planetary rotation, explain unusual ejecta patterns, impacting stratigraphic interpretations.

More Related Videos

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
09:44

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

Published on: June 5, 2014

12.9K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.4K

Related Experiment Videos

Last Updated: Aug 8, 2025

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
07:54

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

Published on: April 3, 2018

8.3K
Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
09:44

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

Published on: June 5, 2014

12.9K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.4K

Area of Science:

  • Planetary Science
  • Impact Cratering
  • Geophysics

Background:

  • Impact ejecta are crucial for planetary stratigraphy.
  • Distal ejecta are typically assumed to have radial distributions.
  • Fast planetary rotation can significantly deflect ejecta trajectories.

Purpose of the Study:

  • To investigate the cause of the peculiar hyperbolic ray associated with Mercury's Hokusai crater.
  • To challenge the interpretation of this ray as evidence for past rapid planetary rotation.
  • To explain the formation of non-radial ejecta distributions.

Main Methods:

  • Analysis of impact dynamics and ejecta trajectories.
  • Modeling of shock wave propagation and ejection angles.
  • Examination of heterogeneous shock impedances in impactor and target materials.

Main Results:

  • The hyperbolic shape of the Hokusai crater ray is attributed to abruptly-steepened ejection angles, not Coriolis forces from rapid rotation.
  • Heterogeneous shock impedances, influenced by topography, cause sudden changes in ejection angles.
  • Distal ejecta can exhibit non-radial distributions due to these mechanisms.

Conclusions:

  • The formation of non-radial ejecta patterns is an inherent aspect of planetary impacts.
  • Unusual ejecta provenances can mislead stratigraphic interpretations and crater-based age estimations.
  • Re-evaluation of ejecta distribution models is necessary for accurate planetary geology.