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Hace 6 días · Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target celestial body and the Earth in the case of sample-return missions.
Hace 4 días · Spacecraft and Subsystems. The Stardust spacecraft consists of a box-shaped main bus 1.6 m long, 0.66 m wide and 0.66 m deep with a high gain dish antenna attached to one face of the bus. The total mass of the spacecraft including the return capsule and 85 kg of propellant is 385 kg.
Hace 4 días · The Huronian glaciation, is not shown, there is a lack of any significant evidence for a Snowball Earth during the time period. The Snowball Earth is a geohistorical hypothesis that proposes during one or more of Earth's icehouse climates, the planet's surface became entirely or nearly entirely frozen with no liquid oceanic or surface water ...
