Local Group member Leo 1 is a dwarf spheroidal galaxy that’s a distant satellite of our own Milky Way Galaxy. It’s one of a number of observing challenges that Leo offers up, though it presents unique difficulties.
A detailed map of the Crab Nebula’s magnetic field shows areas of turbulence are more patchy and asymmetrical than previously expected, an indication current models need refinement.
The Hubble Space Telescope finds a globular cluster with a population of helium-rich red giants that raises questions about currently accepted theories regarding how such clusters form.
The James Webb Space Telescope’s infrared view of the Cas A supernova remnant may help resolve questions about high concentrations of dust in early galaxies.
The James Webb Space Telescope captures a detailed infrared view of Uranus, showing its dusty rings in sharp relief along with storms and the steeply-tilted planet’s polar cap.
Messier 17 is a familiar target for amateur astronomers, an impressive nebula in even modest telescopes. But the Swan reveals its vast extent in a spectacular shot from the European Southern Observatory’s 2.2-metre La Silla telescope.
Using space- and ground-based telescopes, astronomers get a rare look at two quasars in the process of merging just 3 billion years after the Big Bang.
Messier 101 in Ursa Major is a magnificent ‘grand design’ spiral galaxy popularly known as the Pinwheel Galaxy. Located high in the northern sky it’s an unmissable target for spring nights.
The “BOAT” of gamma ray bursts – the brightest of all time – raises new questions about how such powerful outbursts are generated and interact with their environments.