Vocabulary Quiz - VocabForce

1. galactic corona

orbital parameter for small bodies

main celestial body in a system

hot, ionized gas surrounding the galaxy

bright, fuzzy features on the Sun's surface

2. Big Bang

loosely bound star group

celestial objects like planets

universe's initial explosive expansion origin event

building block of a planet

3. prograde motion

dense core exerting gravitational influence

star's movement across the sky over time

movement in the direction of rotation

apparent shift due to Earth's movement

4. luminosity

layer separation in planets

measure of how elliptical an orbit is

Sun-object-observer angle

total energy emitted by an object

5. heliopause

deviation in orbital motion

related to stars

time taken for one orbit

boundary where solar wind ceases

6. neutrino

study of life beyond Earth

part of Sun obscured

parameters defining an orbit

elusive subatomic particle

7. zenith

highest point in the sky directly overhead

time for a galaxy to complete an orbit

slow westward shift of rotational axis over time

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

8. culmination

highest point a celestial object reaches in sky

hot, ionized gas surrounding the galaxy

asteroid sharing orbit with a planet

region of space with gravity so strong nothing escapes

9. semi-diameter

90-degree phase angle between celestial objects

tiny solid particles in space affecting light and heat

study of celestial objects at submm wavelengths

radius of a celestial object as seen from Earth

10. galactic period

time for a galaxy to complete an orbit

radius of a celestial object as seen from Earth

process of dominating surrounding space in orbit

large celestial body orbiting a star

11. axis of rotation

gravitational locking of orbits

edge of a celestial body's disk

cool, less luminous star, often red

imaginary line around which an object spins

12. nutation

study of celestial objects at submm wavelengths

wobble in Earth's rotation axis

graph plotting stars' brightness vs. temperature

plane of Earth's orbit around the Sun

13. planet

large celestial body orbiting a star

small planet-like body orbiting the sun, not classified as planet

orbit following Kepler's laws, elliptical shape

use of diverse signals for study

14. Am star

visible without telescope

massive burst of solar plasma and magnetic fields

chemically peculiar star with strong metal lines

region where a body’s gravity dominates

15. dwarf star

dense central core of a galaxy or star cluster

small, low-mass star, often red or brown

large, bright cloud of plasma in Sun's atmosphere

group of hot, massive stars

16. gravitational collapse

stars in a galaxy's extended disk

center of mass of two or more orbiting bodies

point directly above observer on Earth's center

contraction under gravity forming stars or structures

17. protostar

study of celestial positions

celestial longitude coordinate

early stage star still gathering mass

close approach of celestial objects as seen from a vantage point

18. coronal mass ejection

star and its planets or companions

small planetary object

massive burst of solar plasma and magnetic fields

Moon blocks Sun from viewpoint on Earth

19. tropical year

astronomical object catalog

closest point in orbit

earth's orbit-based year length

maximum speed of electromagnetic waves

20. obliquity

constellation belt along ecliptic

sudden magnetic field change in solar wind

axial tilt of a planet or star

vast supercluster including the Milky Way

Vocabulary Quiz:

1. galactic corona

2. Big Bang

3. prograde motion

4. luminosity

5. heliopause

6. neutrino

7. zenith

8. culmination

9. semi-diameter

10. galactic period

11. axis of rotation

12. nutation

13. planet

14. Am star

15. dwarf star

16. gravitational collapse

17. protostar

18. coronal mass ejection

19. tropical year

20. obliquity

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. galactic corona

2. Big Bang

3. prograde motion

4. luminosity

5. heliopause

6. neutrino

7. zenith

8. culmination

9. semi-diameter

10. galactic period

11. axis of rotation

12. nutation

13. planet

14. Am star

15. dwarf star

16. gravitational collapse

17. protostar

18. coronal mass ejection

19. tropical year

20. obliquity

Select vocabulary category you want to browse:

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