Astronomers have detected an unknown object passing in front of a star whose mass is more than twice that of the Sun. The exact nature of this phenomenon remains unclear, but several hypotheses are being considered to explain it.

Characteristics of the star ASASSN-24fw

The star ASASSN-24fw is located about 3,200 light-years from Earth and is roughly twice as massive as the Sun. For many years, it was considered stable, but recently a decrease in its brightness was recorded, lasting for 200 days. This is one of the longest such events ever observed by astronomers. The cause of this dimming is still unknown.

Possible explanations for the phenomenon

According to recent studies, one theory suggests the presence of a brown dwarf surrounded by rings that could extend over 26 million kilometers. Brown dwarfs are substellar objects with masses between 13 and 75 times that of Jupiter, sometimes referred to as "failed stars."

Another hypothesis considers the existence of an exoplanet larger than Jupiter. Although the origin of this object remains a mystery, it has been established that the star ASASSN-24fw is surrounded by clouds of gas and dust, which may have formed as a result of ancient collisions between exoplanets.

Further research

New observations of the star are planned using the Very Large Telescope to determine its precise age and composition. This data could help answer several questions about the nature of the observed phenomenon. The next dimming event of the star is expected in 42–43 years.