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Libra 2021 โš–๏ธ old ๐Ÿš€

A stick figure is looking through a telescope at the Libra constellation

I just learned that one of the universeโ€™s oldest stars lies inside the Libra constellation - HD 140283, a.k.a. Methuselah. A recent study suggests it’s about 12 billion years old - thatโ€™s not that long after the Big Bang. One of the clues is itโ€™s low metallicity - it was born in a time when metals were rare and everything was made mostly of hydrogen and helium. Methuselah is around 200 light years away and you need binoculars or a telescope to see it. If you do, remember that the photons that land on your retina (splat!) were made inside an extremely experienced photon maker indeed. ๐Ÿ‘ต๐Ÿป

#readingaboutastronomymakesyousmarter
#readinghoroscopesdoesnothing

Sources:
1. Hubble finds birth certificate of oldest known star. NASA. Available at: nasa.gov/mission_pages/hubble/science/hd140283.html (Last updated: July 2013; Accessed: September 2021).
2. Plait P. Methuselah’s star is not older than the universe after all. But it’s still pretty frakking old. Bad Astronomy. Available at: syfy.com/syfywire/methuselahs-star-is-not-older-than-the-universe-after-all-but-its-still-pretty-frakking-old (Last updated: May 2021; Accessed: September 2021).
3. Tang J and Joyce M. Revised best estimates for the age and mass of the Methuselah star HD 140283 using MESA and interferometry and implications for 1D convection. Res Notes AAS 2021;5:117. Available at: iopscience.iop.org/article/10.3847/2515-5172/ac01ca (Accessed: September 2021).
4. Big Bang. Cosmos, Swinburne Centre for Astrophysics and Supercomputing. Available at: astronomy.swin.edu.au/cosmos/B/Big+Bang (Accessed: September 2021).

Leo 2021 ๐Ÿฆ lavish ๐Ÿš€

This panel has an asterisk that says: Warning: based on real information from WiseHoroscope and Marie Claire. A cartoon lion wearing a crown with a Gucci logo is talking to a stick figure scientist who is standing at a telescope. The lion says: Did you know that the universe makes Leos live fast, vigorously and lavishly?

The lion continues: We must dress in Gucci, which we finance via creative visualisations of piles of cash. The scientist has raised eyebrows and has turned away from his telescope.

The lion continues: ... and to maintain our robust circulation we must eat fried or boiled beef, chicken, liver, and light non-fat sauces. The scientist looks amused.

The scientist says: Did you know that physicists can make the universe reveal its secrets? The lion looks a bit confused and awkward.

The scientist continues enthusiastically: In 1989, the COBE satellite began measuring cosmic microwave background radiation - the oldest light there is. Its data confirmed the Big Bang theory of the origin of the universe. It also showed that Earth moves at 390 km/s - so we're all living pretty fast. The lion looks a bit sad.

The scientist adds: By the way, the universe is making you eat dog food. The lion now looks very dejected.

Sources:
1. Leo 2021 Horoscope. WiseHoroscope. Available at: wisehoroscope.org/astrology/yearly-overview/leo (Accessed: July 2021).
2. Stars Special: Your 2021 Horoscopes Are Here! Marie Claire. Available at: marieclaire.com.au/2021-horoscope (Accessed: July 2021).
3. COBE. NASA Science. Available at: science.nasa.gov/missions/cobe (Last updated: July 2015; accessed: July 2021).
4. Herman R. How fast is the earth moving? Scientific American. Available at: scientificamerican.com/article/how-fast-is-the-earth-mov/ (Last updated: October 1998; accessed: July 2021).
5. Pedigree Chopped Ground Dinner. Adult canned wet dog food combo with chicken, liver & beef flavor. Pedigree. Available at: pedigree.com/dog-foods/details/pedigree-chopped-ground-dinner-combo-with-chicken-beef-liver (Accessed: July 2021).