Data from the Dark Energy Spectroscopic Instrument suggest that the orbit, orbital energy, and angular momentum of the globular cluster NGC 4147 make it unlikely to be associated with the Sagittarius dwarf galaxy.
A simulated 12-day unoccupied aircraft system Mars mission, which took place in Iceland, demonstrated the advantages of this mission architecture for exploring large, impassible areas.
An upgraded method to produce full-disk vector magnetograms of the Sun’s photosphere produces results that improve upon the standard Solar Dynamics Observatory pipeline.
A new method leverages observations of microlensing effects in gravitationally lensed quasars to measure the rotation of these extreme objects’ accretion disks.
Catherine Fielder et al 2024 AJ 168 212
Follow-up Hubble Space Telescope observations suggest that some ultra-diffuse galaxies were once normal dwarf galaxies that have been stripped and heated.
Using two possible models of black hole spin and accretion, researchers have forecast very-long-baseline interferometry observations at six frequencies.