Indian astronomers have performed X-ray observations of an X-ray binary designated 4U 1907+09. Results of the observational ...

A long-simmering disagreement over the universe’s present-day expansion rate shows no signs of resolution, leaving experts ...

A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of ...

However you pronounce it, its unexpected dimming draws even more attention to this red supergiant variable star in Orion ... a lot of headlines as its luminosity has shifted dramatically several ...

By comparing a Cepheid variable’s apparent brightness, and its calculated luminosity ... maps of the Milky Way by finding the distances to star clusters that fortunately included a Cepheid ...

An observational tango has thus emerged between the two methods. The transit method generates a large number of “candidates”, which are then confirmed by spectrographs around the world, determining ...

It’s a bit difficult to determine the exact size of either star, as VY Canis Majoris and UY Scuti are both variable. Their apparent size and luminosity often change, meaning they are technically ...

The second approach looks at Cepheid variable stars, which act like cosmic beacons ... giving astronomers a reliable way to determine their true luminosity. By comparing their actual brightness to how ...

"When I first spotted this system with a very high total mass on our galactic doorstep, I was immediately excited." ...

A star called T Corona Borealis may "go nova" next week, making the star briefly visible to the naked eye. It last happened in 1787, 1866 and 1946.