cometary造句
1. Frequent breakup and erosion of cometary nuclei provides not only vast quantities of meteoric dust, but also occasional larger fragments.
2. The cometary events responsible for these multiple episodes of fragmentation are clearly important to the terrestrial planets.
3. Larger pieces of dirty cometary ice may also be dislodged by this furious evaporation.
4. The largest known cometary nuclei presently in Earth-crossing orbits are about ten kilometers in diameter.
5. From meteor studies we know that cometary meteors break up over a very wide range of dynamic pressures during atmospheric entry.
6. No cometary meteor shower has ever produced a meteorite fall.
7. So the cometary dust work had to take priority.
8. A mixture of meteoritic water and cometary water would not work either because this combination would still contain a higher concentration of deuterium than is found in the oceans.
9. This cometary debris – bits of ice – create a meteor shower.
10. The cometary ejection play a crucial role in formation and evolution of the meteoroid stream.
11. Whether a cometary outburst with a jet can cause observable short - term non gravitational effect is investigated.
12. Cometary accurate orbital motion is a complex and difficult problem. Its remarkable characteristic is the presence of the non-gravitational effect.
13. The glass in the regolith owes its origin to impacts of cometary and asteroidal material with the lunar surface.
14. The body that had been photographed with a definite cometary tail in 1949 was now a bare rock.
15. It is almost certain that, during the Earth's early history, the planet was a frequent victim of cometary impacts.
16. It is interesting to reflect upon the possibility that a meteorite-sized chunk of cometary material might survive its fall to Earth.
17. Extraction at Berkeley of a keystone from a tile on the Stardust cometary dust collector.
18. The goal of TAOS project is measuring the number and size distribution of Kuiper Belt Objects ( KBOs ) down to a few kilometer size of cometary nuclei.
19. We just released the findings from our preliminary analysis on the cometary side.
20. Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin. Christopher Intagliata reports The Apollo moon missions ended almost 40 years ago.
21. Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin.