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Sagittarius 2021 🏹 heart 🚀

A stick figure is lying on a crescent moon and looking up at the Sagittarius consellation

If you ever need to face the centre of our galaxy, just find the Sagittarius constellation. Sagittarius sits in an area of the sky that points to the heart of the Milky Way. And that beating heart is a supermassive black hole 4.6 million times the mass of the Sun. It’s called Sagittarius A* (Sgr A*) and it’s 26,000 light-years from Earth - close enough for us to see the hot gas that swirls around it. Sgr A* affects the orbits of nearby stars, which researchers can track to test things like Einstein’s general theory of relativity. A theory that’s still holding up after more than a century. 💪

#readingaboutastronomymakesyousmarter
#readinghoroscopesdoesnothing

Sources:

1. Zimmermann KA. Sagittarius constellation: Facts about the archer. Space.com. Available at: space.com/21653-sagittarius-constellation.html (Last updated: May 2017; Accessed: Nov. 2021).

2. Boen B. Supermassive black hole Sagittarius A*. NASA. Available at: nasa.gov/mission_pages/chandra/multimedia/black-hole-SagittariusA.html (Last updated: Aug. 2017; Accessed: Nov. 2021).

3. Blome C, Lepo K, Perez Y. Black holes: Sagittarius A* - Identifying our galaxy’s supermassive black hole by tracking stars’ orbits. ViewSpace. Available at: viewspace.org/interactives/unveiling_invisible_universe/black_holes/sagittarius_a (Accessed: Nov. 2021).

4. Taylor Tillman N and Bartels M. Einstein’s theory of general relativity. Space.com. Available at: space.com/17661-theory-general-relativity.html (Last updated: Jun. 2021; Accessed: Nov. 2021).

✍️ Edit: The authors of a recent paper are challenging the idea that Sgr A* is a black hole. They’re proposing that it might be dark matter (‘darkinos’). We’ll have to wait and see.

Leo 2021 🦁 lavish 🚀

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).