All Things

Revolution is moving around something, rotation is something rotating on its axis

Summer and winter solstices are the lognest and shortest days of the year, equinoxs are when the night and day are the same length

Seen from Canada: Cassiopeia, Cancer, Virgo Seen year round from Canada: Draco, Cassiopeia, Ursa Major/Minor

Aries (March 21 – April 19) Taurus (April 20 – May 20) Gemini (May 21 – June 20) Cancer (June 21 – July 22) Leo (July 23 – August 22) Virgo (August 23 – September 22) Libra (September 23 – October 22) Scorpio (October 23 – November 21) Sagittarius (November 22 – December 21) Capricorn (December 22 – January 19) Aquarius (January 20 – February 18) Pisces (February 19 – March 20)

Get your star map and look at it

Asteriods: Greek word meaning starlike Meteors: thing high up in the sky Meteorites: a meteor that hits Earth

Gas giant composition: hydrogen, helium, some methane Terrestrial composition: rocks, silicate, water, and/or carbon Gas giants are less dense than terrestrials

Copernicus: first proposed that the Earth orbits the sun and the Earth spins on its own axis approx. once per day Galileo: made the first telescope (refracting) Kepler: found many exoplanets, proposed the 3 laws of planetary motion Brahe: Discovered a supernova in the Cassiopeia constellation, observed elliptical orbit of a comet HR diagram: made in 1910 by Ejnar Hertzsprung and Henry Norris Russell Drake equation: created in 1961 by Frank Drake

Rotates in a way that is unusual

Spring tides are when the sun and moon are aligned causing strong tides Neap tides are when they are not aligned causing weaker tides Spring tides occur during solar eclipses

Stars moving away from us are redshifted, and moving towards us are blueshifted

cepheid variable stars and type 1A supernovas

Corona, chromosphere, photosphere, convecction zone, radiation zone, core

Giant explosion after a star dies

Collapsed core of a massive super giant star with a total mass between 10 and 25 solar masses

An astronomical object that has a gravitational pull so strong that nothing - not even light - can escape it

Our universe isn’t old enough that’s why most of the stars are found along the Main Sequence.

Uses hydrogen for fuel

Phase after red giant where the star has exhasuted all its nuclear fuel Only the hot core remains

Neutron stars that send electromagnetic signals toward Earth in millisecond intervals

Quasi stellar radio sources Happens when a black hole has debris around it then the debris falls into it, causing it to turn into a sort of particle accelerator

O is hottest, M is coolest, our Sun is G

Open: few hundred very old stars, 10-30 ly across, scattered around the galactic center Globular: thousands to millions of stars, that are 10-30 million years old, nearly always in the spiral arms, with a diameter of 30 ly

Theorized to be a particle yet to be discovered