We identified a ~4-micrometer-long, ~1 x 10^-10 g "nugget" of Ir metal in a melt rock sample from the Chicxulub impact basin. This particle, which consists of an aggregate of subhedral Ir metal grains surrounded by a thin coating of silicate, was isolated in the course of our efforts to better understand the partitioning of projectile material

IAUC 6339 available at Central Bureau for Astronomical Telegrams.

We study the gas distribution in the recent merger remnant NGC 3656, a perturbed elliptical. The total gaseous mass content is a few times 10^9^M_sun_. The galaxy contains comparable amounts of atomic and molecular hydrogen. Roughly 90% of the gas mass lies at or near the prominent minor axis dust lane of the galaxy. There are also strong

IAUC 6355 available at Central Bureau for Astronomical Telegrams.

In this paper we illustrate some of the capabilities of the Correlation Tracker prototype developed at the Instituto de Astrofisica de Canarias used for two-dimensional, high spatial resolution, solar spectroscopy. Slit spectra have been taken, using the Correlation Tracker as a stabilizer (minimizing image motion during exposures) and as an

In this paper the description of the Solar Correlation Tracker prototype built by the Instituto de Astrof isica de Canarias is presented. The system is mainly conceived as a solar image tranquilizer, although a scanning utility has also been included in order to displace the image on the final focal plane with sub-arcsecond steps, thus allowing to