... expanded since it came into being with a big bang, scientists use a model known as lambda CDM (or ΛCDM). The symbol for Lambda Λ refers to Albert Einstein’s cosmological constant which describes the energy density of space – a characteristic...
... Universe because its ingredients are not completely certain. The model – called Lambda-CDM – includes two key ingredients; cold dark matter (CDM) and dark energy. However dark matter has never been directly detected, while...
... was the expansion of the Universe. The rate of this expansion is determined by the current Standard Cosmological Model, "Lambda CDM", and it has in the past through the study of light from supernova explosions been calculated to be about...