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A massive black hole at the heart of a galaxy in the Virgo constellation is waking up, shooting out intense X-ray flares at regular intervals that have puzzled scientists, a study said Friday.

The rare cosmic phenomenon, called an Einstein ring, occurs when massive objects can bend light due to their gravitational influence.

Europe's Gaia space telescope was powered down and sent into "retirement" on Thursday after a decade revealing the secrets of the Milky Way, but its observations will fuel discoveries for decades to come.

The first survey data from the European Space Agency's pioneering Euclid satellite was made public.

Europe's Euclid space telescope, which is on a mission to shed light on the mysteries of dark matter and dark energy, released its first data Wednesday with a little help from volunteers and artificial intelligence. 

A team of astrophysicists has gained the longest, most detailed glimpse yet of the “void” that lurks in the middle of our galaxy.

The picture includes data that involved about 23 days of observing time.

Messier 31 is located 2.5 million light-years away from Earth and was a much bigger target in the sky than the galaxies Hubble routinely observes.

The research shows how the stars were behaving eight billion years ago.