Chinese astronomers have discovered that the warp in the Milky Way's spiral disk is precessing backward due to the influence of the mass of dark matter that forms an invisible halo around the galaxy. The discovery was made using the "motion picture" method, which used data from the's astrometric spacecraft' to map the warp's position and speed. The team found that the precession rate decreases with distance from the galactic center, which will lead to greater warping of the disk. The findings could potentially help predict how dark matter is being distributed in the universe, leading to models that attempt to predict what is made of it.

Astronomers have discovered a galaxy similar in shape to the Milky Way, but significantly larger and older, named J0107a, which dates back to the universe's infancy 11.1 billion years ago. The discovery was made using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile and NASA's James Webb Space Telescope. Despite the size and mass of the galaxy, it is more compact than its predecessor and has a star formation rate approximately 300 times higher. The research raises questions about the formation of galaxies so early in their history that it may need to be revised. The Webb telescope has also found that galaxies with a spiral shape appeared earlier than previously known.

New observations have revealed that the Milky Way's spiral arms could stretch further and wider than previously thought, according to a study published in the journal journal Astrophysics. The discovery could significantly change our understanding of the galaxy's structure, which was discovered over 175 years ago in 1850. The researchers used data from NASA's Chandra X-ray observatory and the European Space Agency's XMM-Newton observatory to measure the spiral arms. They found these distances were more precise due to the use of X-rays from gamma-ray bursts, which are powerful explosions that occur far beyond our galaxy. The team also found that the most distant arm, which they found to be about 3,500 light-years wide, was about ten percent more distant than was previously thought. These findings could have significant implications for astronomers' understanding of how the galaxy evolved.

For the first time, a fast radio burst, a rare, fleeting burst of astronomical radio waves, has been identified from within the Milky Way. The signal flash originated from a magnetar, a type of neutron star, according to NASA. The discovery could potentially help unravel solar secrets. Chris Bochenek, a doctoral student at the California Institute of Technology, said the discovery could help explain the origin of fast radio bursts.

The moon was not in view during the crew’s orbit in the night portions — which meant the Milky Way’s main belt was bright enough for one of the astronauts, Matthew Dominick, to take a photograph just before sunrise.