A huge deposit of porous rock straddling the Martian equator likely formed as a result of explosive volcanoes erupting three billion years ago that were powered by climate-changing volatile gases trapped in the red planet’s interior
M66 is a familiar galaxy to amateur astronomers around the world, the largest member of a trio of interacting galaxies in the constellation Leo. This shot by the Hubble Space Telescope reveals M66 in all its glory, with its asymmetric spiral arms and a displaced core.
In the most clear-cut observation yet, ESA and NASA X-ray telescopes spot the telltale flare of an elusive intermediate-mass black hole devouring a passing star in the outskirts of a galaxy 740 million light years away
Changes in the light emerging from active galactic nuclei, powered by supermassive black holes, may be explained by clouds of intervening dust that can dim and redden the radiation, eliminating the need for more exotic explanations.
NASA’s Juno spacecraft continues to send back spectacular images of Jupiter, including this look at the giant planet’s northern temperate zone where ammonia ice clouds roam in chaos amid high-speed winds and deeper, warmer cloud structures.
A new experiment is proposed to measure dark matter interactions with normal matter, using ultra-precise observations of a binary pulsar to search for signs of a possible “fifth force” acting across the cosmos.
For the first time, astronomers have directly witnessed the aftermath of a black hole consuming a nearby star, imaging the formation and expansion of a high-speed jet of material ejected in the maelstrom.
Energetic Wolf-Rayet stars near the end of their lives produce fast-moving stellar winds that can interact with the surrounding interstellar medium to generate spectacular bubbles in space. They rarely emit X-rays, but ESA’s XMM-Newton space telescope caught one in the act.
By measuring the motion of carbon monoxide molecules in a protoplanetary disc, two teams of astronomers have found three planets lurking in the rings of dust around a star just a few million years old.
NASA managers are optimistic the agency’s Opportunity Mars rover will survive a huge dust storm that is preventing sunlight from recharging the robot’s solar arrays, knocking it out of contact with Earth.