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Tag Archives: dark energy

Dark Energy [Q&A]

Karthik asks, what is Dark Energy? To put it succinctly: I don’t know. At this point, it is just a name given to something that we don’t really understand. We know from looking at the brightness of Type Ia supernovae (which have very predictable intensities, so their apparent brightness is a good tracker of distance) […]

Is Dark Matter matter? [Q&A]

Karthik asks, if we convert some Dark Matter to energy, will that be energy as we know it, or Something Elseā„¢? The history of astronomy has been a series of shocks to the ego of mankind, as the importance of our place in the Universe keeps shrinking. First it turned out that the Earth was […]

Lambda-CDM [Q&A]

Ankith from Poornaprajna PU College asks, what is the Lambda-CDM model? It is the standard model developed to describe Big Bang cosmology. Lambda refers to Einstein’s cosmological constant that describes what is nowadays called Dark Energy, and CDM stands for Cold Dark Matter. The vast portion of the energy budget of the Universe is locked […]