- 産業: Astronomy
- Number of terms: 6727
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Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission ...
Energy derived from the Sun or sunlight for use as a source of electricity.
Industry:Astronomy
The intensity of electromagnetic radiation (such as ultraviolet, visible light, and infrared, etc. ) across a range of wavelengths. A prism separates white light into the range of wavelengths we call a rainbow of colors. "Spectrum" is the singular form of the word.
Industry:Astronomy
Landing site of Apollo 11 on the Moon on July 20, 1969; Mare Tranquillitatis.
Industry:Astronomy
The geologic history of Earth's Moon has been divided into five broad time periods, or systems. From oldest to youngest, these are pre-Nectarian, Nectarian, Imbrian, Eratosthenian, and Copernican. These systems are defined by the number of impact craters on the ground surface (more craters = older surface) correlated to the absolute ages determined for the lunar rock samples returned to Earth by the U. S. Apollo missions and unpiloted Soviet Luna missions. The pre-Nectarian system extends from 4. 5 billion to 3. 9 billion years ago.
Industry:Astronomy
The geologic history of Mars has been divided into three broad time periods, or Epochs. From oldest to youngest, these are Noachian, Hesperian, and Amazonian (named after places on Mars). These Epochs are defined by the number of impact craters on the ground surface; older surfaces have more craters. The Noachian Epoch extends from the birth of Mars to between 3. 8 and 3. 5 billion years ago. The actual timing of the Epochs is not known because we have different models of the rates of meteorite falls on Mars.
Industry:Astronomy
Съвкупността от всички видиве води на Земята или друга планета - океани, морета, реки, езера, язовири, блата, ледници, подземни води, водата в атмосферата
Industry:Astronomy
Взривно изригване на лава (разтопена скала), горещи газове и изхвърляне на горещи фрагменти от скали и лава.
Industry:Astronomy
