Stars
- Created by: Charlie
- Created on: 02-02-16 15:57
View mindmap
- Stars
- Constellations
- Double stars
- Stars that look like they are close together
- Brightness of stars labelled using greek alphabet
- Brightest stars start with alpha, then descend down the alphabet and they get dimmer
- Specific constellations
- Orion
- Cygnus
- The plough
- Cassiopiea
- Use constellations as pointers
- Arcturus and Polaris from the plough
- Polaris follow the edge of the plough straight up
- Arcturus "follow the arc to Arcturus"
- Sirius, Pleiades and aldebaran from Orion
- Sirius, follow Orion's belt to the left so get to Sirius and right to Aldebaran
- Pleiades follow the right shoulder up
- Fomahault and Andromeda galaxy from the great square of Pegasus
- Andromeda follow diagonally from bottom right to top left
- Fomalhaut follow the right side down
- Arcturus and Polaris from the plough
- Asterisms - Shapes within a constellation
- Open clusters - A loose grouping of stars
- Nebulae - Interstellar cloud of dust and gas
- Globular clusters - Spherical cluster of stars that orbits a galactic core as a satalite
- Double stars
- Observing the sky
- Right ascension and declination
- Right ascension - the angular distance measured measured eastwards along the celestial equator
- Declination - Point on the celestial sphere.
- Polaris = +90 (straight up from north pole)
- Appears fixed in the night sky because in relation to the Earth it's above the north pole, the axis in which the Earth rotates.
- Circumpolar stars
- Stars (close to Polaris in our case) that are seen all year round
- Use of planesphere or programme to plan observing sessions
- Messier catalogue
- Right ascension and declination
- Physical properties
- Stars in constellation have no revelation to each other
- Stars in a cluster are gravitationally bound
- Binary stars are two stars orbiting a central point
- Apparent magnitude scale
- Use the scale of apparent magnitude
- Parallax
- Parsecs
- distance at which one astronomical unit subtends an angle on one arcsecond
- Absolute magnitude is the actual brightness of a star
- Inverse square law of light
- Intensity = 1/distance*2
- M=m+5-5logd
- Cepheid variables
- Draw curves
- Determine light period from said curve
- (hint look at time scale x-axis, peak to peak)
- Determine light period from said curve
- Used to detirmine distance
- Using its apparent and absaloute magnitudes
- Draw curves
- Identify binary star from light period
- Large dips in light vs small dips in light
- Information from spectrum
- Elements in stars
- Untitled
- Stars in constellation have no revelation to each other
- Evolution of stars
- Life cycle of stars
- Large mass
- Stellar nebula
- Main sequence massive star
- Red supergiant
- Supernova
- Neutron star
- Extremely dense
- Very small radius compared to main sequence stars
- Blackhole
- Extreme gravity
- Densest thing in the known universe
- Emit radiation
- Not visible through opitcal
- Neutron star
- Supernova
- Red supergiant
- Main sequence star
- Red giant
- Planetary nebula
- White dwarf
- Planetary nebula
- Red giant
- Main sequence massive star
- Stellar nebula
- solar mass
- Stellar nebula
- Main sequence massive star
- Red supergiant
- Supernova
- Neutron star
- Extremely dense
- Very small radius compared to main sequence stars
- Blackhole
- Extreme gravity
- Densest thing in the known universe
- Emit radiation
- Not visible through opitcal
- Neutron star
- Supernova
- Red supergiant
- Main sequence star
- Red giant
- Planetary nebula
- White dwarf
- Planetary nebula
- Red giant
- Main sequence massive star
- Stellar nebula
- Large mass
- Emission and absorption and open clusters
- Birth of a star
- Planetary and supernovae
- Death of star
- Life cycle of stars
- Constellations
Comments
No comments have yet been made