Results 321 to 330 of about 128,266 (357)
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2015
A critical unknown is how life originated on Earth. Was it seeded from elsewhere, or did it generate spontaneously from indigenous nutrients? The current vogue is the belief system that life will evolve on a planet with water, carbon dioxide, and warmth, given a few hundred million years.
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A critical unknown is how life originated on Earth. Was it seeded from elsewhere, or did it generate spontaneously from indigenous nutrients? The current vogue is the belief system that life will evolve on a planet with water, carbon dioxide, and warmth, given a few hundred million years.
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Mars observer as a precursor to intensive exploration of Mars
Acta Astronautica, 1992The Mars Observer Mission, to be launched by the United States in September 1992, is designed to perform an extended orbital study of the Martian surface, atmosphere, climate, and gravitational and magnetic fields using a spacecraft in Mars orbit for one Martian year.
Thomas E. Thorpe +2 more
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Balloons for the exploration of Mars
Advances in Space Research, 1993Abstract The Soviet mission to Mars envisioned in 1994 consists of two probes, each of which will carry a balloon described in the present paper. Since a balloon in the Martian atmosphere is driven essentially by thermal forces, the only possibility for a balloon flight is to stay at ceiling during the day and deposit half the mass of a guiderope ...
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Biology and the Exploration of Mars
JAMA: The Journal of the American Medical Association, 1966After the moon, where do we travel next? Mars, many students of this problem believe, is the most logical site to begin planetary exploration. And this book is a series of reports prepared by subgroups of the Space Science Board of the National Academy of Sciences; the reports contain discussions of what types of experiments to attempt, how much can be
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Space Programs and Technologies Conference, 1990
Several robotic exploration missions to Mars that are proposed for inclusion in the Space Exploration Mission are reviewed. The missions discussed range from remote sensing orbital missions to landed missions, such as simple surface stations and roving vehicles. The discussion covers engineering and science objectivess of the missions, data acquisition
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Several robotic exploration missions to Mars that are proposed for inclusion in the Space Exploration Mission are reviewed. The missions discussed range from remote sensing orbital missions to landed missions, such as simple surface stations and roving vehicles. The discussion covers engineering and science objectivess of the missions, data acquisition
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Mission opportunities for human exploration of Mars
Planetary and Space Science, 1998Abstract An indirect optimization procedure is applied to find the mission opportunities for a manned or round-trip mission to Mars. Both the conjunction-class and opposition-class high-thrust trajectories are considered, taking into account simple legs (with only departure and arrival impulses), three-impulse legs (departure, midcourse and arrival ...
CASALINO, LORENZO +2 more
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Mars Airborne Canyon Explorer for Mars surface exploration. [PDF]
57th International Astronautical Congress, 2006 G. Oldenziel +10 more
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“Mars on $300K a day”: The Mars exploration program
Acta Astronautica, 1996Abstract The Mars Exploration Program is pioneering a series of “better, faster, cheaper” missions to Mars over at least the next 10 years, and possibly well into the 21st century. The overall cost of the program is somewhat over $100M per year, including launch vehicles and operations, for two launches every 26 months. (This works out to about $300K
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THE MARS EXPLORATION ROVERS: HITTING THE ROAD ON MARS
IFAC Proceedings Volumes, 2005Since the beginning of time, people have been fascinated by Mars. From the earliest mission to now-Mars has been (and is) a challenging destination. The Rovers were developed at a breakneck pace in 3 years and landed successfully on Mars in January 2004.
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