Astronomers discovered that galaxies can devour other galaxies. Through observations and simulations, they found evidence of large galaxies consuming smaller ones, leading to the growth and formation of massive galaxies.
In 2019, scientists discovered an ancient star in our own Milky Way galaxy that appeared to be almost entirely devoid of metals. Known as SDSS J0023+0307, this "cold star" is composed almost entirely of hydrogen and helium
In 2018, the Mars Curiosity rover detected the presence of methane in the Martian atmosphere. This discovery was surprising because methane on Mars is expected to break down within a few hundred years due to sunlight and chemical reactions.
Also known as Boyajian's Star, this star, officially named KIC 8462852, gained attention in 2015 due to its irregular and significant dips in brightness. Some scientists speculated that these fluctuations could be caused by an alien megastructure partially blocking the star's light
In 2017, astronomers using gravitational lensing techniques discovered that galaxy clusters are connected by "bridges" of dark matter. These bridges made up of invisible dark matter.
Several missions, including India's Chandrayaan-1 and NASA's Lunar Reconnaissance Orbiter, detected the presence of water ice in permanently shadowed regions of the Moon.
Astronomers have identified a region of space known as the Great Attractor, which exerts a gravitational pull on our Milky Way galaxy and other nearby galaxies.
These are high-energy particles that originate from beyond our solar system, and studying them has provided insights into the structure and composition of the universe.
FRBs are intense bursts of radio waves coming from distant sources in the universe. They were first discovered in 2007, and their origin remains a mystery.
In 2017, an object named 'Oumuamua was discovered, making it the first known interstellar visitor to our solar system. Its elongated shape and unusual trajectory indicated that it originated from outside of our solar system.