Astronomy Test 5

Front 1

Theory of special relativity

Back 1

A description of mechanics and electro magnetic theory formulated by Einstein according to which measurement of distance time in mass are affected by the observer's motion

Front 2

Molecular cloud

Back 2

Nebula that cool enough for molecules to form often these are regions of much larger bodies of gas and dust

Front 3

Overcontact binary

Back 3

A close by and airy system in which the 2 stars share a common atmosphere

Front 4

Accretion disk

Back 4

An orbiting disk of matter spiraling in toward a star or black hole

Front 5

Gravitational redshift

Back 5

Do you read shift of protons leaving the gravitational field of any massive object such as a star or black hole

Front 6

Planetary nebula

Back 6

Low mass giant stars puff away the outer layers as successive stages of Shell fusion burnout. The expanding material is seen as a planetary nebula and the exposed oxygen core is a white dwarf.

Front 7

Supernova remnant

Back 7

A nebula left over after a supernova detonates

Front 8

Photodisintegration

Back 8

The break up of new Kali in the core of a massive star due to the effects of Energetic gamma rays.

Front 9

Theory of general relativity

Back 9

A description of space time formulated by Einstein explaining how gravity affects the geometry of space and the flow of time

Front 10

Magnetar

Back 10

Expresly hot rapidly rotating neutron stars whose motion helps generate extra strong magnetic fields

Front 11

Asymptotic giant branch star

Back 11

A red giant star that has completed core helium fusion and has reexpanded for a second time

Front 12

Event horizon

Back 12

The location around a black hole where the escape velocity equals The speed of light, the boundary of a black hole

Front 13

Cosmic censorship

Back 13

The notion that the only connection between a black hole in the universe is the black hole's event horizon

Front 14

Black hole

Back 14

An object whose gravity is so strong that the escape velocity from it exceeds the speed of light

Front 15

Light house model

Back 15

The Explanation. a pulsar pulses by rotating and funneling energy outward via magnetic fields that are not aligned with the rotation axis.

Front 16

Xray burster

Back 16

A neutron star in a binary star system that a creeks mass, Undergoes thermonuclear fusion on its surface, And therefore emit short burst of x-rays.

Front 17

Spacetime

Back 17

The concept from special Relativity that space and time are both ascensional in describing the position, Motion, And action of any object or event.

Front 18

Virtual particle

Back 18

A particle and its anti particle created simultaneously in pairs in which quickly disappear without a trace.

Front 19

Hawking process

Back 19

The formation of real particles from virtual ones just outside a black hole's event horizon, The means by which black holes evaporate.

Front 20

Neutron star

Back 20

A very compact dense stellular remanent composed almost entirely of neutrons.

Front 21

Pulsar

Back 21

A pulsating source associated with a Rapid rotating neutron star with an off axis magnetic field.

Front 22

Population 1 star

Back 22

A star such as a son who spectrum exhibits spectral lines of many elements heavier than helium, A metal rich star.

Front 23

Cosmic ray

Back 23

High speed particles traveling through space.

Front 24

Glitch

Back 24

A sudden speedup in the period of a pulsar.

Front 25

Schwarzschild radius

Back 25

The radius of a sphere that just enclosed the event horizon of a black hole.

Front 26

Sunspot maximum

Back 26

The time during the solar cycle when the number of sunspots is greatest.

Front 27

Spectroscopic binary

Back 27

A double star who's bi nary nature can be deduced from the periodic Doppler shifting of lines in its spectrum

Front 28

Hertzsprung Russell diagram

Back 28

A plot of the absolute magnitude or luminosity of stars versus their surface temperature or spectral class.

Front 29

Stellar parallax

Back 29

The apparent shift in a nearby stars position on the celestial sphere Resulting from Earth orbit around the Sun

Front 30

Absolute magnitude

Back 30

The apparent magnitude that a star would have if it were 10 parsecs from earth.

Front 31

Filament

Back 31

A dark curve seen above the Sun's photosphere that is the top view of a solar prominence.

Front 32

Eclipsing binary

Back 32

A double star system in which stars periodic Li pass in front of each other as seen from Earth.

Front 33

Solarwind

Back 33

an outward flow of particles mostly Elektron and protons from the Sun.

Front 34

Transition zone

Back 34

Region between the Sun's chromosphere and Corona where the temperature skyrockets to about 1 million k

Front 35

Sunspot

Back 35

A temporary cool region in the solar photosphere created by protruding magnetic fields.

Front 36

Plasma

Back 36

A hot ionized gas

Front 37

Prominence

Back 37

Claim like protrusion seen near the limb of the Sun and extending into the solar Corona. The side view of a filament.

Front 38

Coronal mass ejection

Back 38

Large volumes of high energy gas released from the Sun's Corona.

Front 39

Close binary

Back 39

A binary star whose members are separated by a few stellar diameters.

Front 40

Thermonuclear fusion

Back 40

A reaction in which the nuclei of atoms are fused together at a high temperature.

Front 41

Solar flare

Back 41

A violent eruption on the Sun's surface

Front 42

Main sequence star

Back 42

A star fusing Hydrogen to helium in its core, Whose surface temperature and luminosity place it on the main sequence of the HR diagram

Front 43

White dwarf

Back 43

A low-mass stellar remanent that has exhausted all its thermonuclear fuel and contracted to size roughly equal to the size of Earth.

Front 44

Cherenkov radiation

Back 44

Radiation produced by particles traveling through a substance faster than light can.

Front 45

Inverse square law

Back 45

The gravitational attraction between 2 objects and the apparent brightness of a light source are both inversely proportional to the square of the distance.

Front 46

Hydrostatic equilibrium

Back 46

A balance between the weight of a layer in a star and the pressure that supports it.

Front 47

Sunspot minimum

Back 47

The time during the solar cycle when the number of sunspots is least.

Front 48

Corona

Back 48

The Sun's outer atmosphere

Front 49

Semidetached binary

Back 49

A close binary system in which one star fills or is overflowing its roche lobe.

Front 50

Wormhole

Back 50

A hypothetical Connecting passage between black holes and other places in the universe

Front 51

Evolutionary track

Back 51

On the HR diagram the path followed by a point representing an evolving star.

Front 52

Nucleosynthesis

Back 52

The process of can burning low mass element Into higher math elements

Front 53

Ergoregion

Back 53

The region of space immediately outside the event horizon of a rotating black hole where it is impossible to remain at rest.