Trending Now - Astronomers Crack Decades-long Enigma of X-ray Emitting Star

WHO:

Astronomers, scientists, and researchers involved in the study.

Japan’s XRISM (X-ray Imaging and Spectroscopy Mission) space telescope.

WHAT:

Discovery of a star being devoured by a stellar companion.

Solved a mystery that has baffled scientists for over 100 years.

Uncovered the source of extreme X-rays from Gamma Cassiopeiae.

Confirmed the existence of a long-predicted type of binary star system.

WHERE:

The observations were made using the XRISM space telescope, which is part of Japan's space exploration efforts.

WHEN:

The mystery surrounding Gamma Cassiopeiae has persisted for over 50 years.

The discovery was reported in 2026.

WHY:

The hidden white dwarf companion is pulling in material and generating extreme heat, leading to the powerful X-ray emissions.

HOW:

Highly precise observations were conducted using the XRISM space telescope.

(UPDATED March 26, 2026 00:41 UTC)

Astronomers and researchers using Japan's XRISM space telescope have made a groundbreaking discovery of a star being devoured by a stellar companion, solving a mystery that has puzzled scientists for over 100 years. This finding confirms the existence of a long-predicted type of binary star system and uncovers the source of extreme X-rays from Gamma Cassiopeiae, a mystery that has persisted for over 50 years. The hidden white dwarf companion is pulling in material and generating extreme heat, which leads to the powerful X-ray emissions observed through highly precise measurements.