这个星系，被称为NGC1097，距我们5千万光年，和我们的银河系一样是个漩涡状星系，有着长长的、由群星组成的旋臂。
The galaxy, called NGC 1097 and located 50 million light-years away, is spiral-shaped like our Milky Way, with long, spindly arms of stars.
瑞士的一组天文学家认为他们在围绕恒星Gliese 581运动的轨道上发现了一颗岩状行星，距地球约有20光年。
The one that the Swiss team thinks it hasdiscovered is in orbit around a star called Gliese 581, some 20 light yearsfrom Earth.
试验了不同节距的螺旋扭状钢筋的粘结锚固性能。
The bond anchorage properties of the rolled and twisted bars with different pitch of twist were studied.
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