An unidentified light source named VVV-WIT-12 (center) is making the two edges of a nebula (circled on either side) brighten and dim in opposite phases.
Roberto K. Saito et al. 2023
A cloud of dust and gas in space, called a nebula, appears to change color and brightness rhythmically every four years, like a galactic mood lamp.
The VISTA telescope in Chile’s Atacama Desert can survey large areas of the Milky Way to look for extremely rare events in our galaxy’s neighborhood, such as supernova explosions, the most recent of which…
