Chandra X-ray Image of Medusa Galaxy
This image of the Medusa galaxy (also known as NGC 4194) shows X-ray data from NASA's Chandra X-ray Observatory. Located above the center of the galaxy and seen in the optical data (below), the "hair" of the Medusa -- made of snakes in the Greek myth -- is a tidal tail formed by a collision between galaxies. The bright X-ray source found towards the left side of Medusa's hair is a black hole.
(Credit: NASA/CXC/Univ of Iowa/P.Kaaret et al.)

Hubble Optical Image of Medusa Galaxy
This Hubble optical image shows the Medusa galaxy (also known as NGC 4194). Located above the center of the galaxy, the "hair" of the Medusa -- made of snakes in the Greek myth -- is a tidal tail formed by a collision between galaxies.
(Credit: NASA/ESA/STScI/Univ of Iowa/P.Kaaret et al.)

NGC 4194 with Scale Bar
(Credit: X-ray: NASA/CXC/Univ of Iowa/P.Kaaret et al.; Optical: NASA/ESA/STScI/Univ of Iowa/P.Kaaret et al.