We need to study the Universe at different scales to explain the genesis and evolution of cosmic phenomena from the first cosmological processes to present day stars and galaxies. The probes we used need to be adapted to the corresponding Read More …
By combining our two major theories, that of the very large, General Relativity, and that of the very small, Quantum Physics (in particular nuclear and particle physics), it has been possible to construct a relatively accurate description of the life Read More …
The discourse on the cosmos, emerging from humans’ interest in the sky and the constellations, was further developed through the ancient Greek philosophies of Nature. During the Renaissance, the geometric and dynamic astronomy of Galileo and Newton was established, wherein Read More …
R Aquarii is a pair of a) a white dwarf star that steadily burns at a relatively cool temperature and b) a highly variable red giant. As they orbit each other, the white dwarf pulls material from the red giant Read More …
The three-dimensional visualization of Eta Carinae, a massive star that had an enormous eruption observed in the 1840s, is based upon multiwavelength data from Chandra, Hubble, and Spitzer. Data from each set of different wavelengths of light reveal different structures Read More …
The world’s very first simulation of a black hole 40 years earlier by Jean-Pierre Luminet, a young researcher at the CNRS at that time, published in 1979 in Astronomy and Astrophysics. It is not an artist’s view but an image Read More …
😉 NGC3242, a planetary #nebula, that have been observed both by @Chandra X-ray Observatory (X-rays in magenta colour) and Hubble Space Telescope (optical in red, green & blue colours) space telescopes. 📖 #Planetary nebulas are a phase that #stars like Read More …
NGC7027, a planetary nebula, that have been observed both by Chandra (X-rays in magenta colour) and Hubble (optical in red, green & blue colours) space telescopes. Planetary nebulas are a phase that stars like the Sun undergo after they run Read More …
NGC6302, a planetary nebula, that have been observed both by Chandra (X-rays in magenta colour) and Hubble (optical in red, green & blue colours) space telescopes. Planetary nebulas are a phase that stars like the Sun undergo after they run Read More …
Galaxy clusters are the largest objects in the universe held together by gravity. They typically contain hundreds of galaxies (stars, gas and dust), spread over a region of whose size is roughly 1025 cm. Their total masses exceed 1048 gm. Read More …
