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The expanding universe, seen through redshifted galaxies and the afterglow of the Big Bang, tells us when time began. (AI Image via DALLE)

13.8 billion years and counting: How we measured the Universe’s age

October 25, 2025 11:10 am

Scientists figured out that the universe is billions of years old — after years of reading ancient rocks and dying stars, and listening to the hiss from the dawn of time.

Image extracted from the Euclid Flagship universe simulations catalogue. Each dot represents a galaxy: blue points mark galaxies at the centers of dark matter clumps, while red points denote satellites within them. (Image Source: Euclid Consortium)

Scientists unveil Flagship 2, the largest universe simulation ever with 3.4 billion galaxies

October 07, 2025 10:04 am

Euclid Flagship 2 was trained on Piz Daint, the third most powerful supercomputer in the world.

Einstein’s general theory of relativity replaced Newton’s force of gravity with the curvature of spacetime, a radical idea still shaping modern physics. (AI-generated image

Gravity's secrets: From Newton's apple to black holes, it is still a mystery

September 23, 2025 11:13 am

From Newton’s falling apple to Einstein’s curved spacetime, our understanding of gravity has come a long way, yet this familiar force remains one of the biggest puzzles in physics.

Physicists once tried to chase light - and in doing so, discovered the hidden architecture of space and time. (AI-generated image: DALLE)

Speed of light: Why nothing in our universe can go faster

September 26, 2025 1:44 pm

From early experiments with lanterns to Einstein’s revelations about space and time, the speed of light has proven to be far more than a number: it’s the cosmic constant that defines reality.

Dr Karan Jani teaching students in a classroom

'Moon a perfect place...': Astrophysicist with Vadodara roots explores ISRO partnership on possibility of sending payload on Chandrayaan-5

August 25, 2025 5:23 am

Dr Karan Jani is a part of the team of Laser Interferometer Gravitational-Wave Observatory (LIGO), in Hanford and Livingston, that observed the gravitational-wave signal, recording the “chirp” from what were black holes of 150 crore years ago, on September 14, 2015.

A deep field image of distant galaxies, each a glowing clue in the search to understand dark energy and the fate of our universe. (AI-generated image: DALLE)

Will our universe rip apart or expand forever? Dark energy holds the answer

September 23, 2025 11:21 am

From exploding stars to cosmic sound waves, here’s how scientists are chasing answers to the biggest mystery in physics.

The cosmic microwave background, detected by chance in 1964, is the faint afterglow of the Big Bang - light that has traveled for nearly 14 billion years. (Image for representation: FreePik)

Galaxies flying away: How Hubble's redshift led us to the Big Bang

August 22, 2025 1:51 pm

From a telescope in California to a radio antenna in New Jersey, scientists uncovered the universe’s explosive origins.

The cosmic beauty of the early universe full of stars, glowing nebulae, and the ancient light from the Big Bang. (AI-generated image/DALLE)

After the Big Bang: How the first stars lit up our universe

August 04, 2025 1:29 pm

The first stars were not just lights in the dark, they were cosmic fire-starters that transformed the universe while seeding the elements that would one day make us.

Is the universe halfway to its end? New theory predicts a Big Crunch in 33 billion years

July 27, 2025 8:57 am

Fresh data from major sky surveys suggests that dark energy, the force pushing our universe apart, might be evolving. This could mean the universe isn’t expanding forever but instead may one day collapse in on itself.