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Related Concept Videos

States of Water01:23

States of Water

Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Conditions on Early Earth02:06

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
Conditions on Early Earth02:06

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
Rocket Propulsion in Empty Space - I01:13

Rocket Propulsion in Empty Space - I

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 rocket's...
Rocket Propulsion in Gravitational Field - II01:03

Rocket Propulsion in Gravitational Field - II

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.
A rocket's acceleration depends on three major factors, consistent with the equation for the...
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

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...

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Related Experiment Video

Updated: Jun 29, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 16, 2013

Making Mars habitable.

C P McKay1, O B Toon, J F Kasting

  • 1Space Science Division, NASA Ames Research Center, Moffett Field, California 94035, USA.

Nature
|August 8, 1991
PubMed
Summary
This summary is machine-generated.

Mars may be terraformed for habitation. Success hinges on readily available carbon dioxide, water, and nitrogen on the planet for supporting plant and human life.

Keywords:
NASA Center ARCNASA Discipline ExobiologyNASA Discipline Number 52-80NASA Program ExobiologyNon-NASA Center

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Conducting Miller-Urey Experiments
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Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

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Related Experiment Videos

Last Updated: Jun 29, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 16, 2013

Conducting Miller-Urey Experiments
11:10

Conducting Miller-Urey Experiments

Published on: January 21, 2014

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Area of Science:

  • Planetary Science
  • Astrobiology

Background:

  • Current understanding suggests Mars is lifeless.
  • Terraforming Mars presents a potential pathway for extraterrestrial habitation.

Purpose of the Study:

  • To assess the feasibility of transforming Mars into a habitable planet.
  • To identify key material requirements for Martian habitability.

Main Methods:

  • Analysis of Martian geological materials.
  • Assessment of atmospheric and subsurface resource availability.

Main Results:

  • Key elements for habitability (carbon dioxide, water, nitrogen) are crucial.
  • The abundance, distribution, and form of these materials are critical factors.

Conclusions:

  • Transforming Mars for habitation is theoretically possible.
  • Availability of essential resources dictates the success of terraforming efforts.