Can Planck-mass relics of evaporating black holes close the universe?

Can Planet Form in Highly Inclined Binaries?

Can planetary nebulae rotate

Can Planetary Nebulae Rotate

Can Planets and Life form in the High Redshift Strong 2175 Å Dust Absorber Galaxies?

Can Plasma Expansion Explain the Observed Acceleration of Ne7+ Ions in a Coronal Magnetic Funnel?

Can population grow forever?

Can pregalactic black holes produce the hard X-ray background

Can pregalactic objects generate galaxies?

Can pregalactic stars or black holes generate an IR background?

Can Quasars Really Ionize the Intergalactic Medium?

Can quasars reionize the intergalactic medium at high redshifts?

Can Radiative Force on Molecules Drive Mass Loss in AGB Stars?

Can red shifts turn blue

Can reddenings of cepheids be determined from mean UBV colours

Can Refractory Meteorite Inclusions (CAIs) be Processed in Parent Body Atmospheres?

Can Relativistic Beaming Reconcile X-ray Data with Self-Compton Predictions?

Can Round Star Clusters Form From Flattened Clouds?

Can shock models explain radio outbursts of active galactic nuclei (AGN) at millimeter and centimeter wavelengths?

Can Simulations of Active Region Magnetic Fields Lead to a Simplified Model of Turbulent Pumping?