Vocabulary Quiz - VocabForce

1. deep-sky object

study of cosmic dust and its effects

large galaxy cluster including Milky Way

distant astronomical objects beyond solar system

frequent meteors from same source

2. small Solar System body

minor celestial object like asteroid or comet

Moon blocks Sun completely

specific date and time for astronomical data

measure of star's color and temperature differences

3. star

study of objects outside our galaxy

study of celestial objects via radio waves

slowing rotation via gravitational forces

luminous celestial body made of hot gases

4. argument of periapsis

angle from ascending node to periapsis in orbit

active galactic nucleus with jet pointing toward Earth

highest point a celestial object reaches in sky

distance from galaxy's center

5. early-type star

reflectivity of a surface, ratio of reflected to incident light

sky as seen from Earth

curve representing stars of same age

hot, blue, massive star with high surface temperature

6. planetology

Earth's natural satellite

the study of planets

moon of a moon; hypothetical or minor

outer layer of a star

7. spectroscopic binary

star phase fusing hydrogen in core

point where orbit crosses celestial plane moving north

extremely large black hole at galaxy's core

star pair detected via spectra shifts

8. apogee

main celestial body in a system

the study of planets

contraction under gravity forming stars or structures

highest point in satellite orbit around Earth

9. stellar dynamics

study of motions of stars within systems

earth's orbit-based year length

imaginary line through Earth's poles

specific date and time for astronomical data

10. extinction

centered on the Sun

loss of light passing through Earth's atmosphere

study of motion of celestial objects

visible distribution of stars in the sky

11. orbital speed

stellar explosion increasing brightness

star used as reference for measurements or calibration

velocity of an orbiting object

stars in a galaxy's extended disk

12. fixed stars

instrument for precise astronomical spectral observations

system of two stars orbiting a common center

stars that appear stationary from Earth's perspective

measure of a celestial object's intrinsic brightness, standardized distance

13. September equinox

meteor that hits Earth's surface

study of life in the universe and its origins

event marking start of fall in northern hemisphere

very small meteorite in atmosphere

14. axial precession

study of motion of celestial objects

slow westward shift of rotational axis over time

apparent shift of nearby objects

lowest point beneath observer

15. redshift

shift toward longer wavelengths indicating recession

study of celestial objects via radio waves

abundance of elements heavier than helium

orbit beyond Neptune

16. stellar

related to stars

long-term gradual change

time for an object to complete one orbit relative to stars

stars sharing common motion

17. extrasolar object

region beyond Earth's atmosphere

celestial body outside our solar system

projection of Earth's equator onto celestial sphere

outer layer surrounding a star

18. celestial meridian

measure of star's color and temperature differences

period between recurring celestial configurations

great circle passing through zenith and poles

material ejected outward from a star as disk

19. apsis

stars that appear stationary from Earth's perspective

celestial coordinate reference point in Libra

closest or furthest point in an orbit around a focus

region beyond Earth's atmosphere

20. supernova

distant comet reservoir in space

theoretical process creating matter-antimatter imbalance

dense stellar remnant like white dwarf or neutron star

massive stellar explosion

Vocabulary Quiz:

1. deep-sky object

2. small Solar System body

3. star

4. argument of periapsis

5. early-type star

6. planetology

7. spectroscopic binary

8. apogee

9. stellar dynamics

10. extinction

11. orbital speed

12. fixed stars

13. September equinox

14. axial precession

15. redshift

16. stellar

17. extrasolar object

18. celestial meridian

19. apsis

20. supernova

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. deep-sky object

2. small Solar System body

3. star

4. argument of periapsis

5. early-type star

6. planetology

7. spectroscopic binary

8. apogee

9. stellar dynamics

10. extinction

11. orbital speed

12. fixed stars

13. September equinox

14. axial precession

15. redshift

16. stellar

17. extrasolar object

18. celestial meridian

19. apsis

20. supernova

Select vocabulary category you want to browse:

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