Beautiful astronomy photos of the week

The sun appears with a strange appearance, while the atoll is like a giant blue pearl in the ocean.

Proton-M missiles carrying three Russian satellites are launched from Baikonur space airport in Kazakhstan on September 2. (Photo: AFP).

The American Aerospace Agency collages many photos together to create an image of the sun's atmosphere and magnetic fields. (Photo: NASA).

The spiral galaxy NGC 4921 is about 320 million light-years away from Earth by the Hubble Space Telescope. (Photo: AFP).

Images of Tropical Storm Frank on the Baja California Peninsula, Mexico on August 28 were taken by the US-based Global Hawk storm surveillance aircraft. (Photo: NASA).

Several hundred new stars form the heat of gas in the Triangulum galaxy, creating red light. Hubble Space Telescope captures this image. (Photo: NASA).

Volcanoes covered by snow on Four Mountains Island, Alaska state, remind people of the image of a strange planet. The American Terra satellite captured this scene on August 27. (Photo: AFP).

The Mataiva Atoll at the Polynesian Islands and the lagoon lies within it, standing amid the deep blue waters of the Pacific Ocean. An astronaut takes this picture from the universe. (Photo: NASA).

Smoke sprayed on the test of Development Motor-2, the largest and most powerful rocket engine NASA built to bring the spacecraft into space, on August 31. (Photo: NASA).

Storm Earl image taken by astronaut Douglas Wheelock (USA) from the International Space Station on August 31. (Photo: AP).