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Related Concept Videos

Energy of a Satellite in a Circular Orbit01:11

Energy of a Satellite in a Circular Orbit

Thousands of artificial satellites orbit the Earth every day at various distances from the Earth. Satellites that orbit the Earth below an altitude of 1,600 km are considered to be orbiting in low-Earth orbit (LEO). Research satellites and Earth observation satellites are usually placed in LEO, and mostly orbit the Earth in elliptical orbits. Navigation satellites are placed in medium-Earth orbit (MEO), ranging from 2,000 km to 36,000 km from the surface of the Earth. Meanwhile, communication...
Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
Trigonometric Substitution01:23

Trigonometric Substitution

Trigonometric substitution is a technique used to simplify integrals that contain square root expressions involving quadratic forms. It is particularly effective when the integrand includes terms resembling those found in standard geometric equations, such as circles or ellipses.Molniya satellites follow highly elliptical orbits, repeatedly sweeping out the same regions of space as they revolve around Earth. To estimate the area enclosed by such an orbit, the path is modeled as an ellipse...
Errors in Global Positioning System01:26

Errors in Global Positioning System

Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
Vector Calculus: Problem Solving01:20

Vector Calculus: Problem Solving

Vector calculus provides mathematical tools for analyzing physical fields that vary throughout space. One important application is the study of gravitational interactions between celestial bodies. Consider the Earth positioned at the origin and a satellite located at a point in three-dimensional space. The Earth exerts a gravitational force on the satellite, and this force can be described by components acting along the coordinate directions. Together, these components form a vector field that...
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Kepler's Third Law of Planetary Motion

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Related Experiment Video

Updated: Jul 11, 2026

Thermocapillary Convection Space Experiment on the SJ-10 Recoverable Satellite
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Published on: March 11, 2020

Geophysicists celebrate two satellites, mourn a third.

R A Kerr

    Science (New York, N.Y.)
    |June 17, 1994
    PubMed
    Summary

    Satellites revealed new lunar data from the Clementine mission and asteroid Ida

    Area of Science:

    • Planetary Science
    • Space Exploration
    • Geophysics

    Background:

    • The American Geophysical Union (AGU) spring meeting showcased diverse research.
    • Satellites, both natural and artificial, were central to key findings presented.

    Purpose of the Study:

    • To highlight significant scientific results from recent space missions.
    • To discuss new data concerning the Moon, asteroids, and Venus.

    Main Methods:

    • Analysis of data from the Clementine spacecraft's lunar orbit.
    • Observation and color analysis of the asteroid Ida's moon.
    • Review of mission status for the Magellan spacecraft orbiting Venus.

    Main Results:

    • First science results from Clementine's 2-month lunar mission were reported.

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  • The color of asteroid Ida's moon was revealed.
  • The planned end-of-mission for the Magellan spacecraft at Venus was discussed.
  • Conclusions:

    • Spacecraft missions continue to yield valuable data across the solar system.
    • Satellite observations are crucial for advancing planetary science and understanding celestial bodies.