Spears of the Sun (The Star Sojourner Series Book 3)

Star Sojourner Series

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Another rock, named Moe, was found to have certain marks on its surface, demonstrating erosion caused by the wind. Most rocks analyzed showed a high content of silicon. In another region known as Rock Garden, Sojourner encountered crescent moon-shaped dunes, which are similar to crescentic dunes on Earth. By the time that final results of the mission were described in a series of articles in the journal Science December 5, , it was believed that the rock Yogi contained a coating of dust, but was similar to the rock Barnacle Bill.

Calculations suggest that the two rocks contain mostly the minerals orthopyroxene magnesium-iron silicate , feldspars aluminum silicates of potassium, sodium, and calcium , quartz silicon dioxide , with smaller amounts of magnetite, ilmenite, iron sulfide, and calcium phosphate. The mission was jeopardised by a concurrent software bug in the lander, [25] which had been found in preflight testing but was deemed a glitch and therefore given a low priority as it only occurred in certain unanticipated heavy-load conditions, and the focus was on verifying the entry and landing code.

The problem, which was reproduced and corrected from Earth using a laboratory duplicate thanks to the logging and debugging functionality enabled in the flight software, was due to computer resets caused by priority inversion. No scientific or engineering data was lost after a computer reset, but all the following operations were interrupted until the next day.

The lander sent more than 2. By taking multiple images of the sky at different distances from the Sun, scientists were able to determine that the size of the particles in the pink haze was about one micrometre in radius. The color of some soils was similar to that of an iron oxyhydroxide phase which would support the theory of a warmer and wetter climate in the past.

Eventually, all but one of the magnets developed a coating of dust. Since the weakest magnet did not attract any soil, it was concluded that the airborne dust did not contain pure magnetite or just one type of maghemite. The dust probably was an aggregate possibly cemented with ferric oxide Fe 2 O 3. Magnetite was found in the soil and that the most magnetic part of the soil was dark.

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Magnetite is very dark. Using Doppler tracking and two-way ranging , scientists added earlier measurements from the Viking landers to determine that the non-hydrostatic component of the polar moment of inertia is due to the Tharsis bulge and that the interior is not melted.

Although the mission was planned to last from a week to a month, the rover operated successfully for almost three months. Communication failed after 7 October, [34] with a final data transmission received from Pathfinder at Mission managers tried to restore full communications during the following five months, but the mission was terminated on March 10, During the extended operation a high-resolution stereo panorama of the surrounding terrain was being made, and the Sojourner rover was to visit a distant ridge, but the panorama was only about one-third completed and the ridge visit had not begun when communication failed.

The on-board battery—designed to operate for one month—may have failed after repeated charging and discharging. The battery was used to heat the probe's electronics to slightly above the expected nighttime temperatures on Mars. With the failure of the battery, colder-than-normal temperatures may have caused vital parts to break, leading to loss of communications. Mars Reconnaissance Orbiter spotted Pathfinder lander in January left. The name Sojourner was chosen for the Mars Pathfinder rover after a year-long, worldwide competition in which students up to 18 years old were invited to select a heroine and submit an essay about her historical accomplishments.

The students were asked to address in their essays how a planetary rover named for their heroine would translate these accomplishments to the Martian environment. The winning essay, which suggested naming the rover for Sojourner Truth , was selected from among 3, essays and was submitted by year-old Valerie Ambroise of Bridgeport, CT.

Second runner-up was Adam Sheedy, 15, of Round Rock, TX, who submitted the name of the late astronaut Judith Resnik , who perished in the Challenger space shuttle explosion. Other popular suggestions included Sacajewea and Amelia Earhart.

From Wikipedia, the free encyclopedia. Comparison of embedded computer systems on board the Mars rovers.

Mars Pathfinder - Wikipedia

Mars portal Spaceflight portal. Space Exploration History on U. Retrieved February 2, Retrieved February 21, Retrieved June 10, Retrieved November 24, Exploration of the Red Planet National Aeronautics and Space Administration. Journal of Geophysical Research.

The alpha proton X ray spectrometer". Retrieved 5 September No one cleans their sidewalks anymore.

About Sahara Foley

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If you continue to use this site we will assume that you are happy with it. Stumpy makes a discovery of his own, too. Filed under My Children's Books. Impetuous young Snowflake, a Siberian husky, and her grumpy but loyal beaver buddy, Stumpy, are challenged in body and soul when they are captured by gnomes in a deadly mine that is the entrance to an underworld of demons. Again, we follow Jules Rammis, a likable, reckless telepathic astrobiologist, as he risks life and limb to close down a slave mine on planet New Lithnia. Come along for the ride.

Book four of my Star Sojourner series is Blood of Denebria.

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Book three of my Star Sojourner series is Spears of the Sun. But his telepathic abilities attract the wrong aliens and Terrans.

This psychotic tyrant intends to extort the combined gold depositories of Earth and all the colony planets to finance an army that will rule the worlds. It looks as though only Jules, with his powerful telepathic abilities, stands between the rat-like general and the total annihilation of our homeworld, planet Earth. Tagged as astrobiologist , Jules , science fiction , Spears of the Sun.

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