Abstract We mapped all boulders larger than 105 m on the surface of dwarf planet Ceres using images Dawn framing camera acquired in Low Altitude Mapping Orbit. find that are more numerous toward high latitudes and have a maximum lifetime 150 ± 50 Ma, based crater counts. These characteristics distinctly different from those asteroid (4) Vesta, an earlier target Dawn, which implies Ceres’ mechan...

High-resolution mapping of Ceres, Vesta and the icy satellites Saturn, Uranus Pluto reveals a rich variety well-preserved impact crater morphologies on these low gravity bodies. These objects provide natural laboratory to study effects composition formation processes under similar surface conditions (though mean velocities vary by several factors). Simple craters occur all bodies but subtle dif...

During the year 2000 the CERES experiment, upgraded with a radial drift TPC, took a large data sample of Pb on Au collisions at 158 AGeV triggered on the 8% most central collisions. A very detailed calibration of the radial drift TPC was since completed. Preliminary results on e + e − pairs and φ mesons reconstructed in the K + K − channel are presented.