Vocabulary Quiz - VocabForce

1. zodiac

brightness change due to rotation

study of universe using gamma-ray observations

constellation belt along ecliptic

star exhibiting multiple pulsation modes

2. orbit

path of celestial object around a star

lowest point beneath observer

star exhibiting multiple pulsation modes

main celestial body in a system

3. hour angle

vast supercluster including the Milky Way

distant icy body region beyond Neptune

earth's orbit-based year length

measure of time since last passage of a star crossing local meridian

4. coronal mass ejection

compact star group at galaxy center

eccentricity of an orbit

massive burst of solar plasma and magnetic fields

stream of charged particles from Sun

5. thin disk population

thermal radiation from early universe

long-term gradual change

stars in a galaxy's flat disk

star observed through Earth's atmosphere

6. origin of longitude

astronomical object catalog

star's movement across the sky over time

reference point for coordinates

highest point in satellite orbit around Earth

7. invariable plane

icy body with glowing tail when near the Sun

point where Earth's axis intersects celestial sphere

plane containing the total angular momentum of system

speed moving along a circular path

8. orbital elements

mass of the Sun used as a standard unit

network or complex system of interconnected parts

star and its planets or companions

parameters defining an orbit

9. solar spicule

star with changing brightness

distant comet reservoir in space

recognized pattern of stars forming mythic shapes

jet of material from Sun's surface

10. protoplanetary disk

90-degree phase angle between celestial objects

rotating disk of material around a young star

active galactic nucleus with jet pointing toward Earth

spread of velocities in a system

11. Tisserand's parameter

orbital parameter for small bodies

star's energy generated by gravitational contraction

speed at which star's equator becomes unstable

sky as seen from Earth

12. observable universe

objects orbiting inside Neptune's orbit

orbit passing over Earth's poles

region visible from Earth

massive stellar explosion

13. equatorial coordinate system

projection of Earth's equator onto celestial sphere

celestial coordinate system based on Earth's equator

surface marking distinguished by reflectivity differences

dense core exerting gravitational influence

14. heliopause

long-term gradual change

variation proportional to square of position

boundary where solar wind ceases

specific date and time for astronomical data

15. globular cluster

orbit matching Earth's rotation, stationary relative to Earth

sky as seen from Earth

region visible from Earth

spherical collection of old stars

16. neutrino

elusive subatomic particle

spatial extent of morning astronomical phenomena

telescope mounted on an aircraft or balloon for observations

centered on the Sun

17. ascending node

astronomical color measurement system

parameters defining an orbit

earth's orbit-based year length

point where orbit crosses celestial plane moving north

18. micrometeorite

location determined by geometric measurements

our galaxy's luminous band in sky

wobble causing shifting equinox points over time

very small meteorite in atmosphere

19. orbital period

time for one orbit

period between recurring celestial configurations

Sun's apparent path

study of motion of celestial objects

20. aphelion

use of diverse signals for study

point in orbit farthest from the sun or star

Sun's visible surface layer

graph representing orbital motion

Vocabulary Quiz:

1. zodiac

2. orbit

3. hour angle

4. coronal mass ejection

5. thin disk population

6. origin of longitude

7. invariable plane

8. orbital elements

9. solar spicule

10. protoplanetary disk

11. Tisserand's parameter

12. observable universe

13. equatorial coordinate system

14. heliopause

15. globular cluster

16. neutrino

17. ascending node

18. micrometeorite

19. orbital period

20. aphelion

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. zodiac

2. orbit

3. hour angle

4. coronal mass ejection

5. thin disk population

6. origin of longitude

7. invariable plane

8. orbital elements

9. solar spicule

10. protoplanetary disk

11. Tisserand's parameter

12. observable universe

13. equatorial coordinate system

14. heliopause

15. globular cluster

16. neutrino

17. ascending node

18. micrometeorite

19. orbital period

20. aphelion

Select vocabulary category you want to browse:

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