Supernova explosions in the Universe

Article Abstract:

A new era has begun in the study of supernovae as a result of recent observational and theoretical work and a renewed understanding of the many roles of supernovae. Research in this area has looked particularly at the context of supernova theory and at the physics of core-collapse supernova explosions. Attention has also been given to the emerging link between supernovae and gamma-ray bursts. It is emphasized that, in significant ways, the histories of stars and galaxy formation and of supernovae are very closely connected.

Supernovae, Supernovas

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Probing dark matter

Article Abstract:

The observations of Bahcall and colleagues using the Wide-Field Camera of the Hubble Space Telescope (HST) have revealed the presence of baryonic dark matter in the Large Magellanic Cloud (LMC). Earlier hypotheses have predicted that ordinary low mass stars in a galaxy are capable of providing the missing mass, instead of the elusive dark matter. The observations of Bahcall reveal the absence of such low mass stars and that the missing mass can be provided only by elementary particles which constitute the dark matter.

Dark matter (Astronomy), Baryons

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Astronomical questions of origin and survival

Article Abstract:

The discovery of the extrasolar planet by Mayor and Queloz called 51 Peg B has sparked various speculations about its origin and possibility of surviving. The planet has similar characteristics as Jupiter with an atmosphere that consists basically of helium and hydrogen. Various speculations about its origin exist. The tidal interactions that determined its present formation may have been exerted on either a giant terrestrial, gas giant planet or a small star.

Analysis, Discovery and exploration, Astronomical research, Planets

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