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A look at real life "death stars" that are far worse than the one in Star Wars such as supernovas that unleash massive gamma-ray bursts (GRB) that could eradicate all life for thousands of light years; a look at "WR 104", a dying star 8000 light years away that could point a GRB right at Earth, and "3C 321", a "death star galaxy" that could be ...
By definition, each population group shows the trend where lower metal content indicates higher age of stars. Hence, the first stars in the universe (very low metal content) were deemed population III, old stars (low metallicity) as population II, and recent stars (high metallicity) as population I. [6] The Sun is considered population I, a ...
25.4 ± 0.2 [100] AD This is the nearest red giant to the Earth, and the fourth brightest star in the night sky. Pollux (β Geminorum) 9.06 ± 0.03 [95] AD The nearest giant star to the Earth. Spica (α Virginis A) 7.47 ± 0.54 [101] One of the nearest supernova candidates and the sixteenth-brightest star in the night sky. Regulus (α Leonis A ...
The age of the oldest known stars approaches the age of the universe, about 13.8 billion years.Some of these are among the first stars from reionization (the stellar dawn), ending the Dark Ages about 370,000 years after the Big Bang. [1]
The following are lists of episodes from the Cosmos series: List of Cosmos: A Personal Voyage episodes, which first aired in 1980. List of Cosmos: A Spacetime Odyssey episodes, which first aired in 2014. List of Cosmos: Possible Worlds episodes, which first aired in 2020.
[3] [4] Iron star: A final state for a star in the far future (10 1500 years) of the universe, when all matter is transmuted to iron via quantum tunneling. — The universe isn't old enough for this form to come into existence. MECO: A hypothetical alternative to black holes. Q0957+561: Planck star: A star where the energy density is around the ...
Georgie & Mandy's First Marriage reintroduces viewers to characters from Young Sheldon while bringing in some new faces as well. The Big Bang Theory, which aired from 2007 to 2019, starred Jim ...
Horizon is a current and long-running BBC popular science and philosophy documentary programme. Series one was broadcast in 1964 and as of July 2020 it is in its 56th series. . Over 1,250 episodes have been broadcast (including specials) with an average of 23 episodes per series during the 56-year