Astronomers can observe the rare event when Mercury passes over the Sun disk for several hours on May 9.
The exploration ship Messenger of the US Aerospace Agency (NASA) ends its mission by crashing into Mercury, after more than four years of spinning around the planet.
Although it is considered geologically dead planet, Mercury was very excited by the activity of numerous volcanoes on the surface a few billion years ago.
Plains on Mercury, discovering the new crater on Mars, the enchanting beauty of Antennae galaxy, ... are the most beautiful cosmic images of the past week.