Doppler effect

An artist's impression of how ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun, may have looked. Credit: ESO/M. Kornmesser, CC BY 4.0

Is the Universe Different In Different Directions?

Joel P. Joseph 29/04/2021

The answer to this deceptively simple question could also...

abhijith-p-C4uCLvK3O-s-unsplash-1200x600

The Surprisingly Difficult Task of Measuring Sea-Level Rise Around India

Shreya Dasgupta 30/08/2020

The term 'mean sea level' sounds simple. As it...

Palomar Transient Factory, Zwicky Transient Facility, small telescopes, Vera Rubin Observatory, Large Synoptic Survey Telescope, Shrinivas Kulkarni, SpaceX Starlink, astronomical twilight, Tata Institute of Fundamental Research, dark energy, Hubble constant, redshift, Doppler effect, charge-coupled devices, Type Ia supernovae, supernova, neutron stars, pulsars, millisecond pulsars, Alex Filippenko, Ooty radio telescope, Govind Swarup, IIT Delhi, Caltech Optical Observatory, Donald Backer,

Interview: Shrinivas Kulkarni, Finder of a Thousand Exploding Stars

Jatan Mehta 25/01/2020

An interview with the creator of the Palomar Transient...

Big Bang, Big Chill, Big Freeze, Big Rip, quantum tunneling, cosmic microwave background radiation, metric expansion of the universe, cosmic inflation, redshift, Doppler effect, metastable valley, Hubble constant, cosmological constant, Quintessence, dark energy, gravity, general theory of relativity,

Why Won’t the Gravity of Galaxies Keep Our Universe From Expanding?

Ronak Gupta 18/11/2019

About five billion years ago, the universe switched gears...