M. Ryle received the Nobel Prize in Physics for 1974.

M. Ryle, Astronomer Royal.

M. Shapley telegraphie: "Cancel Metcalf Comet"

M. Thollon's Atlas of the Solar Spectrum

M. Tisserand's "Traité de Mécanique Céleste"

M. V. Lomonosov and his astronomical works

M. Wilson Doppler Velocity Measurements

M. Wolf's New Apparatus

M.-A. Tonnelat's Research Concerning Unified Field Theory

M.C.R.G. Study of Fixed-connectivity Surfaces

M.I.N.G., Mars Investment for a New Generation: Robotic construction of a permanently manned Mars base

M.i.p. detection performances of a 100 us read-out CMOS pixel sensor with digitised outputs

M.I.T. Space Grant Program Photoelectric Observations of Variable Stars for High School Students

M.I.T. studies of transient X-ray phenomena

M.J. Carlowicz and R.E. Lopez, Storms from the Sun: the Emerging Science of Space Weather

M.K. Tikhonravov as a Pioneer of National Astronautics

M/L and Color Evolution for A Deep Sample of M* Cluster Galaxies at z~1: The Formation Epoch and the Tilt of the Fundamental Plane

M/L and velocity anisotropy from observations of spherical galaxies, or must M87 have a massive black hole

M/L Constraints on the Mass of the Neutrino

M/L for Double Galaxies, a Correction.