Nearby quasars result from galactic encounters. Binary star in the Small Magellanic Cloud as gravitational lens gives hints on dark matter . First isotope measurements of Copper and Zinc in the galactic cosmic rays. NASA names X-ray observatory and schedules launch.
Carbon offers glimpse of origin and evolution of the universe.
Anisotropy measurements of the cosmic microwave background indicate that the expansion of the universe is slowing. Science selects research about the accelerated expansion of the universe as top advance in science for 1998. About the observations at the Cerro Tololo Inter-American Observatory. About the observations at the European Southern Observatory. About the work of the 'Supernova Cosmology Project'.