Concordia research station in the heart of Antarctica witnessed its last sunset for over three months last Sunday. From here on they will work and live under artificial lighting as they survive and conduct research at the remotest base on Earth.

The Danish 1.54-metre telescope located at ESO's La Silla Observatory in Chile has captured a striking image of NGC 6559, an object that showcases the anarchy that reigns when stars form inside an interstellar cloud.

These delicate wisps of gas make up an object known as SNR B0519-69.0, or SNR 0519 for short. The thin, blood-red shells are actually the remnants from when an unstable progenitor star exploded violently as a supernova around 600 years ago. There are several types of supernovae, but for SNR 0519 the star that exploded is known to have been a white dwarf star -- a Sun-like star in the final stages of its life.

Istanbul and the surrounding area in northwestern Turkey are captured in this Envisat image. To the north is the Black Sea, which connects to the Sea of Marmara (centre) via the Bosphorus strait. The Dardanelles strait connects the Marmara to the Aegean Sea (lower left corner).

Turkey is a Eurasian country with the majority of its territory in southwestern Asia and a small portion in the Balkan region of southeastern Europe.

One of the Expedition 35 crew members aboard the Earth-orbiting International Space Station used a digital camera equipped with a 400 millimeter lens to capture this image of the island of Ibiza (Eivissa in the native Catalan language), located off of the southeastern coast of Spain.

One of the Expedition 35 crew members aboard the Earth-orbiting International Space Station photographed this night image of Monterrey, Mexico on April 15, 2013. The spacecraft was orbiting approximately 216 miles above a point centered at 27.0 degrees north latitude and 103.2 degrees west longitude. ISS035-E-022540 (15 April 2013) - high res (3.7 M) low res (118 K)