O*******d
发帖数: 20343 | | O*******d
发帖数: 20343 | 2 Clouds flow like a river over the lights of Swiss villages as the rising sun
crowns the Alps with morning gold in a January 30 picture. To the right, a
crescent moon and the bright dot of Venus decorate the paling sky.
Venus is closer to the sun than Earth, so—like a car going around a
racetrack—Venus periodically overtakes Earth as it orbits. This means Venus
changes from the evening star, visible after sunset, to the morning star,
visible before sunrise, every 584 days. | S*****0
发帖数: 516 | |
|
