Gravitational lensing occurs when a massive celestial body — such as a galaxy cluster — causes a sufficient curvature of spacetime for the path of light around it to be visibly bent, as if by a lens. The body causing the light to curve is accordingly called a gravitational lens.
Gravitational lenses are one of the most fascinating phenomena predicted by Einstein’s theory of general relativity. Imagine space as a fabric, and massive objects like stars and galaxies as weights pressing down on this fabric, creating curves and warps.
The expansion of the universe is not only increasing but also accelerating.
It all started with a Big Bang, will it ultimately end with a Big Rip. The Big Rip is a speculative cosmological hypothesis regarding the ultimate fate of the universe. Proposed in the early 21st century, it suggests a scenario in which the expansion of the universe accelerates to such an extent that it eventually tears apart all matter,
Possible White Hole spotted?
A white hole is a hypothetical astronomical object that is the reverse of a black hole. While a black hole is known for its immense gravitational pull, which prevents anything, including light, from escaping its event horizon, a white hole is theorized to be a region of spacetime from which matter and energy can only emerge.
Astronomers catch fizzled-out gamma-ray burst from supernova
Here is a list of the most energetic events in the universe, arranged in order. Please note that the ordering of these events can vary depending on specific criteria used, such as total energy released, peak luminosity, or different types of radiation considered. The references provided should offer comprehensive information on each topic.
An area of outer space within a dense nebula in which gas and dust are contracting, resulting in the formation of new stars.
A stellar nursery refers to a region in interstellar space where new stars are born. These regions are characterized by dense concentrations of gas and dust, which provide the necessary materials for the formation of stars. Stellar nurseries are important cosmic environments where the process of star formation occurs, leading to the creation of individual stars, stellar clusters, and even entire galaxies.
The first interstellar object detected passing through the Solar System.
‘Oumuamua (pronounced oh-MOO-ah-MOO-ah) is a highly elongated, cigar-shaped object that became a topic of significant interest in the field of astronomy when it was discovered on October 19, 2017, by astronomers using the Pan-STARRS1 telescope in Hawaii[1].
Cosmic inflation is a theory of exponential expansion of space in the early universe, believed to have lasted from 1036 seconds to between 1033 and 1032 seconds after the Big Bang.
Inflation is a concept in cosmology that refers to a period of rapid expansion of the universe in its early stages. It is a theory proposed to explain several observed features of the universe, such as its overall homogeneity, isotropy, and the absence of certain types of relics.
A kilonova is an astronomical event that occurs when two neutron stars collide.
One of the most significant astronomical events in recent history occurred on August 17, 2017, when astronomers detected the collision of two neutron stars some 130 million light-years away.
To achieve the spatial distribution of stars in a Globular Cluster, as has been observed, a black hole fraction of 22% is necessary.
Globular clusters are fascinating astronomical objects composed of densely packed groups of stars. They are distinct from open clusters, which typically contain a few hundred stars, as globular clusters can host hundreds of thousands to millions of stars.
According to astronomers, our Milky Way galaxy and the Andromeda galaxy will collide in four billion years.
When the Milky Way and Andromeda galaxies collide, it will be a significant event in the history of our universe. Here’s what is expected to happen based on current scientific understanding:
