Given realistic propulsion options, and the requirement that the spacecraft can slow down to orbit its target, the target star cannot be more than 15 light-years from Earth.
根据实际的推进选择，以及航天器能够减速以环绕其目标公转的需要，目标恒星不能离地球超过15光年。
There isn't enough room here to discuss the various propulsion schemes for accelerating a craft to at least 1/10th the speed of light.
没有太多的余地可以考虑，以将航空器加速到至少光束的十分之一。
The carbon dioxide and monoxide were detected by Mark Swain, a research scientist at NASA's Jet Propulsion Laboratory in California, using Hubble to study infrared light emitted from the planet.
美国宇航局加利福尼亚州喷气推进实验室的科学家马克斯温，利用哈勃太空望远镜研究了该星球发射的红外线，发现了二氧化碳和一氧化碳。
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