The rate at which the universe is expanding, known as the Hubble constant, is one of the fundamental parameters for understanding the evolution and ultimate fate of the cosmos.
Astronomy
Mar 11, 2024
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151
The universe consists of hundreds of billions of galaxies, and for nearby galaxies, distances are mainly measured by classical Cepheids and RR Lyrae (RR Lyr) stars.
Astronomy
Jun 20, 2023
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79
Celestial phenomena that change with time such as exploding stars, mysterious objects that suddenly brighten and variable stars are a new frontier in astronomical research, with telescopes that can rapidly survey the sky ...
Astronomy
Mar 15, 2023
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91
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 Earth, almost half the distance ...
Astronomy
Jan 9, 2023
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710
New Chinese research suggests that optical variability in emission-line galaxies (ELGs) is likely caused by star-formation activity rather than the activity of supermassive black holes.
Astronomy
Dec 2, 2022
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89
Ohio State University astronomers have identified about 116,000 new variable stars, according to a new paper.
Astronomy
Jun 1, 2022
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398
Researchers from Yunnan Observatories of the Chinese Academy of Sciences reported their new findings on the study of pulsating Algol type (EA) eclipsing binaries. A total of 57 new pulsating stars were detected from 1,626 ...
Astronomy
Apr 6, 2022
0
67
Volunteer citizen scientists parsing data from a network of telescopes around the world this year identified 10,000 new variable stars in the Milky Way, according to a recent paper.
Astronomy
Nov 10, 2021
0
229
Betelgeuse (α Orionis) is the bright reddish star located in the shoulder of the Orion constellation and can be seen by the naked eye in the night sky.
Astronomy
Aug 5, 2021
3
382
The expanding shell of gas and dust that surrounds the star is about five light-years wide, which equals the distance from here to the nearest star beyond the Sun, Proxima Centauri.
Astronomy
Apr 23, 2021
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