返回首页    向前一天   今天   向后一天    下载4K壁纸

The Earth as seen from the International Space Station

The Earth as seen from the International Space Station (© JSC/NASA)

The Earth as seen from the International Space Station (© JSC/NASA)

So close, yet so far

We've reached perihelion! Two weeks after winter solstice the Earth's orbit is closer to the sun than on any other time of year—a result of the Earth’s elliptical orbit. You may think, 'if we’re so close to the sun, why can’t I feel the heat?' Well, that's because we're only receiving about 7% more solar energy than normal, which doesn’t really have much impact on the weather.
© JSC/NASA