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Stellar streams in the Gaia era
Price-Whelan, Adrian M.; Bonaca, Ana
The hierarchical model of galaxy formation predicts that the Milky Way halo is populated by tidal debris of dwarf galaxies and globular clusters. Due to long dynamical times, debris from the lowest mass objects remains coherent as thin and dynamically cold stellar streams for billions of years. The Gaia mission, providing astrometry and spectropho…
Martian hydrosphere: A brief overview of water on Mars
Gopalchetty, Brahma
Understanding the status of water on Mars is crucial for evaluating its capacity to support life and to serve as a resource for future possible human exploration. Investigations have been carried out in the past to find signs of water in its past or present states. It is generally agreed that Mars had significant amounts of water early in its exis…