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Related Concept Videos

Space Trusses: Problem Solving01:29

Space Trusses: Problem Solving

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A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. Due to its adaptability and capacity to withstand complex loads, the space truss is widely used in various construction projects.
Consider a tripod consisting of a tetrahedral space truss with a ball-and-socket joint at C. Suppose the height and lengths of the horizontal and vertical...
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Rocket Propulsion in Empty Space - I01:13

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The driving force for the motion of any vehicle is friction, but in the case of rocket propulsion in space, the friction force is not present. The motion of a rocket changes its velocity (and hence its momentum) by ejecting burned fuel gases, thus causing it to accelerate in the direction opposite to the velocity of the ejected fuel. In this situation, the mass and velocity of the rocket constantly change along with the total mass of ejected gases. Due to conservation of momentum, the...
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Circular Orbits and Critical Velocity for Satellites01:16

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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...
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Impact: Problem Solving01:26

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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...
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Rocket Propulsion in Gravitational Field - II01:03

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A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
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Rocket Propulsion In Empty Space - II01:12

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The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket...
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Roboticists are grappling with space debris.

Jake J Abbott1

  • 1Robotics Center and Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA.

Science Robotics
|June 11, 2025
PubMed
Summary

Robotic solutions are essential for on-orbit servicing of satellites and addressing the growing problem of space debris. This technology is critical for the future of space sustainability.

Area of Science:

  • Robotics and Space Engineering

Background:

  • Increasing satellite population and aging infrastructure create a critical need for space-based services.
  • Accumulating space debris poses a significant threat to operational satellites and future space missions.

Purpose of the Study:

  • To highlight the necessity of robotic systems for effective on-orbit servicing.
  • To underscore the role of robotics in mitigating space debris hazards.

Main Methods:

  • Review of current challenges in space debris remediation.
  • Analysis of robotic technologies applicable to satellite servicing.
  • Case studies of potential robotic servicing missions.

Main Results:

  • Robotic systems offer versatile solutions for satellite repair, refueling, and de-orbiting.

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  • Automated debris capture and removal are feasible with advanced robotic manipulators.
  • Robotic servicing can extend satellite lifespans and reduce orbital congestion.

    • Conclusions:

    • Robotic solutions are indispensable for sustainable space operations.
    • Investment in robotic servicing technology is crucial for managing the space environment.