Vocabulary Quiz - VocabForce

1. direct motion

apparent movement of celestial objects along the sky

observable boundary of the sky

minor celestial object like asteroid or comet

measure of resistance to rotation

2. plane of the sky

path of a star or galaxy over time

sky as seen from Earth

motion of two gravitational bodies

dense remnant of supernova

3. tidal stream

total energy emitted by an object

sky coordinate system centered on the galaxy

star trail from gravitational stripping

temperature of a blackbody emitting the same radiation.

4. meteor shower

human-made object orbiting a planet or star

list of recorded stars and data

brightness change due to rotation

frequent meteors from same source

5. solar flare

official naming of stars

frequent meteors from same source

intense burst of solar radiation

smaller collection of galaxies in a cluster

6. astronomy

free-floating planet not orbiting a star

any physical entity in space observed visually or otherwise

gas cloud with molecules, star-forming

scientific study of celestial objects and phenomena

7. culmination

alignment of celestial bodies in apparent line

star with faint spectral lines

highest point a celestial object reaches in sky

theoretical study of celestial phenomena

8. night sky

star exhibiting multiple pulsation modes

sky visible during nighttime

the study of planets

wobble causing shifting equinox points over time

9. Roche limit

closest distance a moon can approach without breakup

apparent shift due to Earth's movement

universe's initial explosive expansion origin event

baseline for celestial coordinate measurement

10. accretion disk

alignment of three celestial bodies in a straight line

rotating disk of matter spiraling into a celestial body

dense remnant of supernova

Sun's visible surface layer

11. Moon

Earth's natural satellite

star's movement across the sky over time

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

material ejected outward from a star as disk

12. secular motion

acceleration due to gravity at Earth's surface

study of space-time ripples from massive bodies

rotating disk of matter spiraling into a celestial body

slow, continuous movement of celestial objects

13. centaur

study of objects in infrared spectrum

small Solar System body between asteroids and comets

star observed through Earth's atmosphere

method judging celestial distances with multiple steps

14. metallicity

slowing rotation via gravitational forces

loss of axial tilt over time

abundance of elements heavier than helium

main celestial body in a system

15. universe

all existing matter and energy

speed moving along a circular path

theory of multiple universes

region between Mars and Jupiter with numerous asteroids

16. protostar

point where Earth's axis intersects celestial sphere

list of recorded stars and data

faint glow from dust in solar system

early stage star still gathering mass

17. astrometry

vast supercluster including the Milky Way

long-term gradual change

stars sharing common motion

measurement of celestial object positions and motions

18. lobster-eye optics

wide-angle imaging for X-ray telescopes

planet closer to the Sun than Earth

highest point in the sky directly overhead

celestial body's companion (moon)

19. celestial meridian

region around a planet influenced by magnetic field

stars beginning hydrogen fusion

great circle passing through zenith and poles

deviation in orbital motion

20. neutrino

great circle passing through zenith and poles

elusive subatomic particle

any physical entity in space observed visually or otherwise

star phase fusing hydrogen in core

Vocabulary Quiz:

1. direct motion

2. plane of the sky

3. tidal stream

4. meteor shower

5. solar flare

6. astronomy

7. culmination

8. night sky

9. Roche limit

10. accretion disk

11. Moon

12. secular motion

13. centaur

14. metallicity

15. universe

16. protostar

17. astrometry

18. lobster-eye optics

19. celestial meridian

20. neutrino

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. direct motion

2. plane of the sky

3. tidal stream

4. meteor shower

5. solar flare

6. astronomy

7. culmination

8. night sky

9. Roche limit

10. accretion disk

11. Moon

12. secular motion

13. centaur

14. metallicity

15. universe

16. protostar

17. astrometry

18. lobster-eye optics

19. celestial meridian

20. neutrino

Select vocabulary category you want to browse:

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