The Observatorio Astronomico Nacional at San Pedro Martir is situated on the summit of the San Pedro Martir Sierra in the Baja California peninsula of Mexico...
San Pedro Mártir: Characteristics of the site for optical and infrared Observations
The Observatorio Astronómico Nacional at San Pedro Mártir is located 31°02'40'' N and 115°28'00'' W on the summit of the Sierra San Pedro Mártir in the Baja...
Satellite Constellation Internet Affordability and Need
Large satellite constellations in low-Earth orbit seek to be the infrastructure for global broadband Internet and other telecommunication needs. We briefly...
Satellite galaxies as probes of the gravitational potentials of large spirals
An aspect of the missing mass problem in galaxies, not easy to address, is whether the dynamical mass distribution is spherical or greatly flattened, following...
Satellite galaxies: the infalling pieces of the puzzle of massive galaxies
Accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of the massive galaxies over cosmic...
Satellites of massive galaxies: the infalling pieces of the puzzle
Accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of massive galaxies over cosmic time. A...