南门二: 离我们最近的恒星系统

南门二: 离我们最近的恒星系统

A star field is filled with red-glowing gas. Near the center is a bright star system Alpha Centauri, the closest star system to our Sun. Please see the explanation for more detailed information.
星场中充满了红色发光气体。中心附近是一个明亮的恒星系统——南门二系统,这是距离太阳最近的恒星系统。有关更多详细信息,请参阅说明。

SpaceX自由号龙飞船拍摄的极光穿过地球大气层的照片

SpaceX自由号龙飞船拍摄的极光穿过地球大气层的照片

通过SpaceX奋进号龙飞船的舷窗,NASA宇航员马修·多米尼克(Matthew Dominick)拍下了这张照片。画面中,SpaceX自由号龙飞船与地球大气层中绚丽的绿色与粉色极光交相辉映,而此时国际空间站正在印度洋上空273英里处翱翔。

M27: 哑铃星云

M27: 哑铃星云

A starfield is shown with a frame dominated by a gaseous nebula. The nebula, filled with structure, appears orange in the center but blue
around the edges. Please see the explanation for more detailed information.
一片星空展现在画面中,画面以一个充满结构的气体星云为主。星云的中心呈橙色,而边缘则显现蓝色。有关更多详细信息,请参阅说明。

贝加尔湖冻结的甲烷气泡

贝加尔湖冻结的甲烷气泡

A frozen lake is shown that appears quite blue. Many oval light-colored bubbles are frozen into the ice, many times in columns. Please see the explanation for more detailed information.
图中显示的是一片冰冻的湖泊,看上去相当蓝。许多椭圆形的浅色气泡被冻结在冰中,许多气泡呈柱状。有关更多详细信息,请参阅说明。