Vocabulary Quiz - VocabForce

1. meteor

planet orbiting a star outside the solar system

meteor that hits Earth's surface

bright streak from atmospheric entry

star light reddening caused by dust

2. Babcock model

reflectivity of a celestial body based on geometry

maximum speed of electromagnetic waves

observable sky area through an instrument

solar magnetic cycle explaining sunspot patterns

3. night sky

very small meteorite in atmosphere

hot, blue, massive star with high surface temperature

large group of galaxy clusters

sky visible during nighttime

4. facula

universe's initial explosive expansion origin event

bright region on the Sun's surface

gravitational effect on objects within a galaxy

cloud of ionized hydrogen gas

5. nova

brightness of object as seen from Earth

gravity stretching objects due to nearby masses

path of a star or galaxy over time

stellar explosion increasing brightness

6. descending node

point where orbit crosses celestial plane heading south

part of Sun obscured

distant comet reservoir in space

lowest point beneath observer

7. meridian astronomy

method judging celestial distances with multiple steps

orbital parameter for small bodies

dusk or dawn light period

study of celestial meridians

8. stellar evolution

shift toward longer wavelengths indicating recession

changes a star undergoes over time

moon orbiting a minor planet

star observed through Earth's atmosphere

9. compact stellar nucleus

time span of observation

minor celestial object like asteroid or comet

contraction under gravity forming stars or structures

dense central core of a galaxy or star cluster

10. topocentric

centered on the Sun

organization overseeing astronomy standards

perspective from Earth's surface

Earth's great circle dividing northern and southern hemispheres

11. baryogenesis

theoretical process creating matter-antimatter imbalance

X-ray bright optically normal galaxy

rotation aligning with orbital period

slow westward shift of rotational axis over time

12. ephemeris

the study of planets

X-ray bright optically normal galaxy

table listing astronomical object positions over time

luminous celestial body made of hot gases

13. inclination

solar magnetic cycle explaining sunspot patterns

study of objects outside our galaxy

angle between a body's orbit and reference plane

frequent meteors from same source

14. speed of light

maximum speed of electromagnetic waves

radius of a celestial object as seen from Earth

closest distance a moon can approach without breakup

moons of Jupiter: Io, Europa, Ganymede, Callisto

15. astrometric binary

distant small Solar System body outside Neptune's influence

dusk or dawn light period

star system identified via precise position measurements

speed at which star's equator becomes unstable

16. fixed stars

Sun's visible surface layer

study of motion of celestial bodies and spacecraft

stars that appear stationary from Earth's perspective

objects orbiting inside Neptune's orbit

17. mean-motion resonance

instrument for observing distant objects

orbital periods in simple ratio

period between recurring celestial configurations

large planet composed mainly of gases

18. elliptical galaxy

material around star from collisions or remnants

temperature of a blackbody emitting the same radiation.

early stage star still gathering mass

a galaxy shaped like an elongated ellipsoid

19. XBONG

relating to the Moon

small rocky body orbiting the Sun, smaller than planets

X-ray bright optically normal galaxy

faint glow from dust in solar system

20. obliquity

celestial body outside our solar system

axial tilt of a planet or star

theoretical study of celestial phenomena

study of galaxies and their structures

Vocabulary Quiz:

1. meteor

2. Babcock model

3. night sky

4. facula

5. nova

6. descending node

7. meridian astronomy

8. stellar evolution

9. compact stellar nucleus

10. topocentric

11. baryogenesis

12. ephemeris

13. inclination

14. speed of light

15. astrometric binary

16. fixed stars

17. mean-motion resonance

18. elliptical galaxy

19. XBONG

20. obliquity

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. meteor

2. Babcock model

3. night sky

4. facula

5. nova

6. descending node

7. meridian astronomy

8. stellar evolution

9. compact stellar nucleus

10. topocentric

11. baryogenesis

12. ephemeris

13. inclination

14. speed of light

15. astrometric binary

16. fixed stars

17. mean-motion resonance

18. elliptical galaxy

19. XBONG

20. obliquity

Select vocabulary category you want to browse:

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