Can a primordial black hole or wormhole grow as fast as the universe?

Can a primordial magnetic field originate large-scale anomalies in WMAP data?

Can a relic cosmological constant reconcile inflationary predictions with the observations?

Can a Satellite Galaxy Merger Explain the Active Past of the Galactic Center?

Can a self-gravitating thin cosmic string obey the Nambu-Goto dynamics ?

Can a simple instrument measure polarization in gamma-ray bursts?

Can a Superfluid Neutron Star Precess Freely?

Can a supernova bang twice?

Can a supernova be located by its neutrinos?

Can a Unruh Detector Feel a Cosmic String?

Can a Very Low-Luminosity and Cold White Dwarf be a Self-gravitating Bose Condensed System

Can a wormhole generate electromagnetic field?

Can a wormhole supported by only small amounts of exotic matter really be traversable?

Can a ``natural'' three-generation neutrino mixing scheme satisfy everything?

Can AB Dor C be a Tight Binary Brown Dwarf?

Can accretion disk properties distinguish gravastars from black holes?

Can accretion disk properties observationally distinguish black holes from naked singularities?

Can all quasars be gravitationally lensed Seyfert's nuclei

Can alpha-DISKS Drive Winds Centrifugally?

Can ambipolar diffusion solve the cosmic lithium problem?