Vocabulary Quiz - VocabForce

1. astrophotography

baseline for celestial coordinate measurement

expanse of space visible from Earth's surface

orbit beyond Neptune

photography of celestial objects and phenomena

2. orbital speed

velocity of an orbiting object

minor celestial object like asteroid or comet

material around star from collisions or remnants

phase of stellar evolution for large stars

3. line of apsides

celestial objects like planets

line connecting closest and farthest points in orbit

abundance of elements heavier than helium

time between consecutive alignments

4. tilt erosion

measure of light absorption

high-energy particles from space impacting Earth

loss of axial tilt over time

speed at which star's equator becomes unstable

5. axis of rotation

imaginary line around which an object spins

instantaneous orbital ellipse

slow westward shift of rotational axis over time

moon of a moon; hypothetical or minor

6. réseau

speed at which star's equator becomes unstable

measure of how elliptical an orbit is

network or complex system of interconnected parts

line connecting closest and farthest points in orbit

7. astronomical unit

apparent movement of celestial objects along the sky

sun's outer atmospheric layer above the photosphere

average distance from Earth to Sun (about 149.6 million km)

gravitational effect on objects within a galaxy

8. quadrature

edge of a celestial body's disk

90-degree phase angle between celestial objects

astronomical color measurement system

list of recorded stars and data

9. invariable plane

loosely bound star group

plane containing the total angular momentum of system

point where Earth's axis intersects celestial sphere

jet of material from Sun's surface

10. axial precession

slow westward shift of rotational axis over time

Earth's rotation period relative to stars

constellation belt along ecliptic

gaseous interstellar cloud

11. coronal loop

time span of observation

time for an object to complete one orbit relative to stars

orbit with period equal to Earth's rotation

magnetic arc of plasma in the solar corona

12. planemo

changes a star undergoes over time

stars in a galaxy's extended disk

celestial body capable of nuclear fusion

abundance of elements heavier than helium

13. heliosphere

axial tilt of a planet or star

Sun's magnetic field extending into space

vernal equinox point marking celestial coordinates

celestial coordinate system based on Earth's equator

14. solar eclipse

Moon blocks Sun from viewpoint on Earth

galaxy luminosity and rotation link

theoretical framework of star development

boundary where solar wind slows abruptly

15. zodiac

constellation belt along ecliptic

sky visible during nighttime

observable sky area through an instrument

protoplanetary disk around a young star

16. celestial meridian

hot, blue, massive star with high surface temperature

star light reddening caused by dust

visible without telescope

great circle passing through zenith and poles

17. multi-messenger astronomy

region where a body’s gravity dominates

use of diverse signals for study

theoretical process creating matter-antimatter imbalance

study of objects outside our galaxy

18. stellar evolution model

asteroid sharing orbit with a planet

theoretical framework of star development

standard plane for measurements

the study of planets

19. early-type star

relating to planets

hot, blue, massive star with high surface temperature

time for a galaxy to complete an orbit

part of Sun obscured

20. Fulton gap

shift toward longer wavelengths indicating recession

study of life in the universe and its origins

failed star with insufficient mass for nuclear fusion

mass range where exoplanets are rare

Vocabulary Quiz:

1. astrophotography

2. orbital speed

3. line of apsides

4. tilt erosion

5. axis of rotation

6. réseau

7. astronomical unit

8. quadrature

9. invariable plane

10. axial precession

11. coronal loop

12. planemo

13. heliosphere

14. solar eclipse

15. zodiac

16. celestial meridian

17. multi-messenger astronomy

18. stellar evolution model

19. early-type star

20. Fulton gap

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. astrophotography

2. orbital speed

3. line of apsides

4. tilt erosion

5. axis of rotation

6. réseau

7. astronomical unit

8. quadrature

9. invariable plane

10. axial precession

11. coronal loop

12. planemo

13. heliosphere

14. solar eclipse

15. zodiac

16. celestial meridian

17. multi-messenger astronomy

18. stellar evolution model

19. early-type star

20. Fulton gap

Select vocabulary category you want to browse:

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