National Aeronautics and Space Administration

Einstein (HEAO-2) Gallery

Diagram of the satellite layout of the HEAO-2 satellite

The HEAO-2 X-ray Telescope mirror assembly.

The HEAO-2 satellite during flight preparation checks.

Einstein Slides

IPC image of the CTB 109 supernova remnant

IPC image of the Perseus Cluster of Galaxies

IPC image of the Hyades Star Cluster

The Pleiades Cluster

Tycho's Supernova Remnant

The Cygnus Loop Supernova Remnant

M31--Center

NGC 4472: A Galaxy in the Virgo Cluster

The Coma Cluster of Galaxies

• Image of HEAO-2 during flight preparation checks courtesy of TRW.

• The Cygnus Loop image is a color version of Fig. 1 of a paper by W.H. Ku et al. in 1984, Astrophysical Journal, Vol. 278, p. 615-618 who give a detailed discussion of the interpretation (as well as a scale and orientation). The supernova remnant is about 2.5 degrees across. In this image, North is up and East is to the right. Most other images of this remnant are flipped horizontally, so East is on the left.