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June 30, 2021 —Our universe is expanding, but our two main ways to measure how fast this expansion is happening have resulted in different answers. An astronomer gives an overview of the most recent observations. ...
Oct. 5, 2022 —Astronomers have discovered a stellar binary, or pair of stars, with an extremely short orbit, appearing to circle each other every 51 minutes. The system seems to be one of a rare class of binaries ...
Apr. 4, 2023 —When it comes to measuring how fast the Universe is expanding, the result depends on which side of the Universe you start from. A recent study has calibrated the best cosmic yardsticks to ...
Mar. 8, 2021 —Among the methods astronomers have found to measure the expansion rate of the local universe, the Hubble constant, surface brightness fluctuations is potentially one of the most precise. Scientists ...
Oct. 28, 2020 —New research proves theoretically that the Weak Equivalence Principle can be violated by quantum particles in gravitational waves - the ripples in spacetime caused by colossal events such as merging ...
Apr. 23, 2021 —In celebration of the 31st anniversary of the launching of NASA's Hubble Space Telescope, astronomers aimed the renowned observatory at a brilliant 'celebrity star,' one of the ...
Aug. 3, 2023 —The study investigated why the paths of meandering rivers change over time and is a step toward understanding what the hydroclimate on Mars was like when there was still surface ...
Oct. 12, 2021 —Astronomers have detected a very unusual variable radio signal from towards the heart of the Milky Way, which is now tantalizing ...
Apr. 6, 2023 —Of the many different kinds of stars, asymptotic giant branch (AGB) stars, usually slightly larger and older than our own sun, are known producers of interstellar dust. Dusty AGBs are particularly ...
Jan. 9, 2023 —Astronomers have discovered more than 200 distant variable stars known as RR Lyrae stars in the Milky Way's stellar halo. The most distant of these stars is more than a million light years from ...