early galaxy problem Author: Rajendra Gupta, Adjunct professor, Physics, L’Université d’Ottawa/University of Ottawa Early universe observations by the James Webb Space Telescope (JWST) cannot be explained by current cosmological models. These models estimate the universe to be 13.8 billion years in age, based on the big-bang expanding universe concept. My research proposes a model that […]
In a paper published today in Science, an international team reports on their discovery of the most ancient and distant fast radio burst located to date, about eight billion years old. The discovery smashes the team’s previous record by 50 per cent. It confirms that fast radio bursts (FRBs) can be used to measure the […]
Where do you think life is more peaceful? Here you have two options: i) in the middle of Madrid, surrounded by all the hustle and bustle of people commuting, shopping, or visiting; or ii) isolated in a monastery at the heart of the Alps. I do not think I need to answer the question, right? […]
Galaxies from the early Universe are more like our own Milky Way than previously thought, flipping the entire narrative of how scientists think about structure formation in the Universe. Using the James Webb Space Telescope (JWST), an international team of researchers has discovered that galaxies like our own Milky Way dominate throughout the universe and […]
NASA’s James Webb Space Telescope has begun the study of one of the most renowned supernovae, SN 1987A (Supernova 1987A). Located 168,000 light-years away in the Large Magellanic Cloud, SN 1987A has been a target of intense observations at wavelengths ranging from gamma rays to radio for nearly 40 years, since its discovery in February […]
nuclear star cluster This image from the NASA/ESA/CSA James Webb Space Telescope shows the heart of M74 (or NGC 628), otherwise known as the Phantom Galaxy. Webb’s sharp vision has revealed delicate filaments of gas and dust in the grandiose spiral arms which wind outwards from the centre of this image. A lack of gas […]
Astronomers have, for the first time, detected radio waves released by a Type Ia supernova, an explosion deriving from a white dwarf star, offering vital insights about white dwarf explosions. . A Type Ia supernova denotes the nuclear burst of a white dwarf star. This supernova category enjoys widespread recognition; astronomers employ these supernovae to […]
Thanks to data from a magnified, multiply imaged supernova, a team of researchers has successfully used a first-of-its-kind technique based on the Refsdal method to measure the expansion rate of the Universe. Their data provide insight into a longstanding debate in the field and could help scientists more accurately determine the Universe’s age and better […]
Recent studies have revealed that the bending of light around massive galaxies is significantly smaller relative to theoretical expectations. This finding, the so-called lensing is low problem, has been interpreted as a breakdown of our cosmological model. Now, a team of scientists has found that the mismatch between theory and observations is actually caused by […]
In 2019, the Event Horizon Telescope (EHT) collaboration produced the first-ever image of a black hole, stunning the world. Now, scientists are taking it further. The next generation Event Horizon Telescope (ngEHT) collaboration aims to create high-quality videos of black holes. But this next-generation collaboration is groundbreaking in other ways, too. It’s the first large […]