News
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SPACE X - NEWS
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February 23, 2019
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March 3 at 3:02 a.m. PST, 2019
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March 04, 2019
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April 11 at 6:35 p.m, 1019
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NASA - NEWS
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May 4, 2019
SpaceX Dragon Heads to Space Station with NASA Science, Cargo
After launching at 2:48 a.m. EDT Saturday, a SpaceX Dragon cargo spacecraft is on its way to the International Space Station with approximately 5,500 pounds of NASA cargo and science investigations that include research into Earth’s carbon cycle and the formation of asteroids and comets.
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February 12, 2008
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February 1, 2008
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Welcome to Dumitru Mutascu web site!
DMUTASCU DESIGN
![Pic1](images/mars.jpg)
![Pic1](images/earth.jpg)
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.[n 5] Earth's axis of rotation is tilted with respect to its orbital plane, producing seasons on Earth. The gravitational interaction between Earth and the Moon causes ocean tides, stabilizes Earth's orientation on its axis, and gradually slows its rotation. Earth is the densest planet in the Solar System and the largest of the four terrestrial planets. Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years. About 71% of Earth's surface is covered with water, mostly by oceans. The remaining 29% is land consisting of continents and islands that together have many lakes, rivers and other sources of water that contribute to the hydrosphere. The majority of Earth's polar regions are covered in ice, including the Antarctic ice sheet and the sea ice of the Arctic ice pack. Earth's interior remains active with a solid iron inner core, a liquid outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics. Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life may have arisen as much as 4.1 billion years ago. Since then, the combination of Earth's distance from the Sun, physical properties, and geological history have allowed life to evolve and thrive. In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. Over 99% of all species that ever lived on Earth are extinct. Estimates of the number of species on Earth today vary widely; most species have not been described. Over 7.6 billion humans live on Earth and depend on its biosphere and natural resources for their survival. Humans have developed diverse societies and cultures; politically, the world has about 200 sovereign states.
FLASH NEWS IMAGES
![Pic1](images/mars_groud.jpg)
1. SOL Day on Marst ------------------------------
Sol (borrowed from the Latin word for sun) is a Mars solar day; that is, a Mars-day. A sol is the apparent interval between two successive returns of the Sun to the same meridian (sundial time) as seen by an observer on Mars. It is one of several units for timekeeping on Mars. The sol was originally adopted in 1976 during the Viking Lander missions and is a measure of time mainly used by NASA when, for example, scheduling the use of the Mars rover.
The average duration of the day-night cycle on Mars — i.e., a Martian day — is 24 hours, 39 minutes and 35.244 seconds.The sidereal rotational period of Mars—its rotation compared to the fixed stars—is only 24 hours, 37 minutes and 22.66 seconds. The solar day lasts slightly longer because of its orbit around the sun which requires it to turn slightly further on its axis.
![Pic1](images/mars_sunset_blue.jpg)
2. Mars Sunset Blue ------------------------------
It seems that Mars and Earth are complete opposites when it comes to the color of the sky: Earth has blue skies by day and warmer-colored sunsets, whereas Mars has rusty orange to yellow skies by day and dusky blue sunsets. It's the same sun that's illuminating both planets, so what's going on? It turns out that the solution is down to the planets' different atmospheres. When sunlight shines on Earth, the elements in the atmosphere scatter blue light in all directions, which is why we see a blue-colored sky. The atmosphere has very little effect on wavelengths at the red end of the spectrum, so these wavelengths of light plow straight through the atmosphere. This is why we see the sun as yellow. During an Earth sunset, red light careens straight through the atmosphere to our eyes, and blue light is scattered away. When this happens, we can appreciate the warmer colors in the light spectrum.
On Mars, instead of an oxygen- and nitrogen-rich atmosphere, there is a thin atmosphere filled with fine dust. "The colors come from the fact that the very fine dust is the right size so that blue light penetrates the atmosphere slightly more efficiently," Curiosity team member Mark Lemmon said in a statement. "When the blue light scatters off the dust, it stays closer to the direction of the sun than light of other colors does. The rest of the sky is yellow to orange, as yellow and red light scatter all over the sky instead of being absorbed or staying close to the sun.
Mars Panorama - Curiosity rover: Martian night