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Observable Objects in Our Universe - Coggle Diagram
Observable Objects in Our Universe
Planetary System
, with our
solar system
as an example, and many new exosolar systems are discovered
Planet
Detection Methods
, including transit, radial velocity, micorlensing, photometry, direct imaging...
Components
: The components of planets vary as their radius gets larger.
Star
The Sun
is mainly formed by hydrogen, helium, and a small quantity of metal.
Life cycle of stars
is determined by their
mass
. High mass stars will become black holes or neutron stars, while low mass ones will become black dwarfs.
HR diagram
, a traditional diagram by which we understand and classify stars, with
temperature
as x-axis and
brightness
as y-axis
An exercise to judge which star cluster is older.
Spectral types
: Stars are divided into seven classes, O, B, A, F, G, K, M, according to their
surface temperature
.
The spectral lines of planetary and star formation nebula differ.
Galaxy
Morphology
of our Milky Way is like a bar surrounded with several spiral arms.
Morphology and age
: Hubble Tuning Fork shows that the more irregular the shape of a galaxy is, the younger it is.
Compact Objects
Black holes
Quasars
Pulsars
Neutron stars
... ...
The Universe
History
Components
: The Universe is mainly composed of dark matter, dark energy and only a few atomic matters.
Major Studies into Different Objects