Vocabulary Quiz - VocabForce

1. albedo feature

surface marking distinguished by reflectivity differences

distant small Solar System body outside Neptune's influence

brightest star in the night sky

region around a planet influenced by magnetic field

2. Tisserand's parameter

pair of stars appearing close in the sky

process of dominating surrounding space in orbit

orbital parameter for small bodies

Earth's orbit period relative to stars

3. moving group

our galaxy's luminous band in sky

stars sharing common motion

point where orbit crosses celestial plane moving north

small star with brightness variation

4. heliocenter

planet orbiting a star outside the solar system

star used as reference for measurements or calibration

vast group of connected galaxies

centered on the Sun

5. barycenter

study of light spectra from objects

center of mass of two or more orbiting bodies

central region of the Milky Way galaxy

bright region on the Sun's surface

6. weak-line star

time for an object to complete one spin

point where orbit crosses ecliptic

small convective cell on the Sun's surface

star with faint spectral lines

7. scattered disc

stars that appear stationary from Earth's perspective

imaginary line through Earth's poles

distant icy body region beyond Neptune

event marking start of fall in northern hemisphere

8. XBONG

X-ray bright optically normal galaxy

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

part of Sun obscured

star phase fusing hydrogen in core

9. stellar

related to stars

celestial body's companion (moon)

extremely large black hole at galaxy's core

the study of planets

10. inferior planet

stars moving together through space

radius of a celestial object as seen from Earth

planet closer to the Sun than Earth

oscillation of celestial bodies like the Moon

11. Oort cloud

loss of axial tilt over time

plane containing the total angular momentum of system

distant comet reservoir in space

intense, brief emission of gamma rays from space

12. tilt erosion

vernal equinox point marking celestial coordinates

loosely bound star group

loss of axial tilt over time

shorter diameter of an ellipse

13. speed of light

categorizing stars by spectra and brightness

maximum speed of electromagnetic waves

sky coordinate system centered on the galaxy

observed minus calculated data

14. star cluster

group of stars gravitationally bound

dense core exerting gravitational influence

dimming near a star's limb

measure of resistance to rotation

15. globular cluster

spherical collection of old stars

changes a star undergoes over time

one celestial body blocking another

theoretical study of celestial phenomena

16. infrared astronomy

study of objects in infrared spectrum

star exhibiting sudden brightness increases

daily apparent movement of stars due to Earth's rotation

hot, ionized gas surrounding the galaxy

17. Kuiper belt

star exhibiting multiple pulsation modes

region of small icy bodies beyond Neptune

Earth's atmosphere layer ionized by solar radiation

planet alignment opposite Sun

18. retrograde motion

planet appears to move backward in sky

astronomical color measurement system

orbit aligning with a body's rotation

axial tilt of a planet or star

19. Wilson–Bappu effect

projection of Earth's equator onto celestial sphere

layer separation in planets

relation between emission lines and star size

celestial body capable of nuclear fusion

20. multiverse

orbit with period equal to Earth's rotation

theory of multiple universes

imaginary line through Earth's poles

wobble in Earth's rotation axis

Vocabulary Quiz:

1. albedo feature

2. Tisserand's parameter

3. moving group

4. heliocenter

5. barycenter

6. weak-line star

7. scattered disc

8. XBONG

9. stellar

10. inferior planet

11. Oort cloud

12. tilt erosion

13. speed of light

14. star cluster

15. globular cluster

16. infrared astronomy

17. Kuiper belt

18. retrograde motion

19. Wilson–Bappu effect

20. multiverse

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. albedo feature

2. Tisserand's parameter

3. moving group

4. heliocenter

5. barycenter

6. weak-line star

7. scattered disc

8. XBONG

9. stellar

10. inferior planet

11. Oort cloud

12. tilt erosion

13. speed of light

14. star cluster

15. globular cluster

16. infrared astronomy

17. Kuiper belt

18. retrograde motion

19. Wilson–Bappu effect

20. multiverse

Select vocabulary category you want to browse:

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