Palermo celebrates Ceres bicentenary

Computer Celebrates NASA's 50th Anniversary

E stablished in October 1958, NASA is celebrating its 50th anniversary. A significant fraction of Computer’s readers are old enough to remember the Apollo 11 mission that landed the first men on the moon, Neil Armstrong and Buzz Aldrin. We have witnessed the space shuttle era and the building of the International Space Station and have watched with keen interest the results of unmanned missions...

Symmetries, Differential Equations, and Applications: Galois Bicentenary

This special issue commemorated the bicentenary of the birth of Évariste Galois who introduced the notion of a group and made fundamental contributions to the solution of polynomial equations.The formal mathematical concept of symmetry thus came fromGalois theory. Symmetry was inaugurated andutilized in the solution of differential equations by Sophus Lie in the 1870s. The algebraic approach ha...

Collection of Ceres Results

CERES is a dilepton experiment at the CERN SPS, known for its observation of enhanced production of low mass ee pairs in collisions between heavy nuclei [ 1]. The fact that the excess pairs had invariant masses above approximately twice the pion mass and that the enhancement was absent in proton induced collisions [ 2] pointed towards pion annihilation ππ → ρ → ee as the additional source of le...

Ceres/na45 Status Report

Ceres’ sunlight atlas⋆

Context. Astronomical research dealing with accurate radial velocity measurements need reliable astronomical standards to calibrate the spectrographs and to assess possible systematics. Stellar radial velocity standards offer a reference at the level of a few hundred m s−1 and are not adequate for most present needs. Aims. We aim to show that sunlight reflected by asteroids is a fairly accessib...