Presented by Sean Brennan. The Stardust mission returned from a 6-year voyage in January of 2006. During the mission it swept through the tail of comet Wild 2 (pronounced Vilt), collecting the microscopic particles streaming from it.
Presented by Marusa Bradac. One of the greatest accomplishments in recent astrophysics is the creation of a model for the complete inventory of the Universe. All the observational data tells us with extremely high certainty that ordinary matter (every particle...