Video Experimental Relacionado
Updated: Jul 11, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Primer encuentro vikingo de fóbios: resultados preliminares
Science (New York, N.Y.)
|January 6, 1978
Resumen
El Viking Orbiter-1 (VO-1) estudió el planeta Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
Sus antecedentes:
- Fobos, la mayor de las dos lunas de Marte, ha sido objeto de interés científico.
- Las misiones anteriores proporcionaron datos limitados sobre las características físicas de Fobos.
Objetivo del estudio:
- Para llevar a cabo una investigación científica intensiva de Fobos.
- Para obtener imágenes de alta resolución y observaciones infrarrojas de Phobos.
- Para estimar la masa y la densidad de Fobos.
Principales métodos:
- Utilizó la nave espacial Viking Orbiter-1 (VO-1) para sobrevuelos cercanos e imágenes.
- Adquirió más de 125 imágenes de televisión y datos de infrarrojos.
- Se midió el efecto gravitatorio de Fobos en la órbita de VO-1 a través de seguimiento radiométrico.
Principales resultados:
- Imagen de aproximadamente el 80% del hemisferio iluminado de Fobos a una resolución de 30 metros.
- Logró distancias de sobrevuelo dentro de los 80 km de la superficie.
- Se estimó la masa de Fobos (GM) y se determinó una densidad media de ~ 1.9 g/cm3.
Conclusiones:
- La baja densidad y la reflectancia espectral de Phobos sugieren una similitud con las condritas carbonáceas.
- Esto implica que Phobos puede haberse formado en el cinturón de asteroides externo.
- Los hallazgos desafían las teorías existentes sobre la condensación de material en el sistema solar temprano.
Videos de Conceptos Relacionados
01:26Impact: Problem Solving
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...
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...
01:19Thomson's e/m Experiment
In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
02:06Conditions 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.
02:06Conditions 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.
01:13Rocket 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...
01:12Rocket Propulsion In Empty Space - II
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 experiences by...