Vocabulary Quiz - VocabForce

1. supernova

dimming near a star's limb

massive stellar explosion

graph representing orbital motion

apparent distance between objects in view

2. geocenter

center point of Earth's mass

our galaxy's luminous band in sky

free-floating planet not orbiting a star

theory of multiple universes

3. tidal stream

failed star with insufficient mass for nuclear fusion

star trail from gravitational stripping

large celestial body orbiting a star

moons of Jupiter: Io, Europa, Ganymede, Callisto

4. polar orbit

orbit passing over Earth's poles

365.25 days in astronomical calendar

slowing rotation via gravitational forces

rotation aligning with orbital period

5. stellar parallax

apparent shift due to Earth's movement

Earth's atmosphere layer ionized by solar radiation

vernal equinox point marking celestial coordinates

study of universe using gamma-ray observations

6. binary star

system of two stars orbiting a common center

moons of Jupiter: Io, Europa, Ganymede, Callisto

shorter diameter of an ellipse

reference point for coordinates

7. astronomical object

region of small icy bodies beyond Neptune

dense remnant of supernova

body similar to planets

any physical entity in space observed visually or otherwise

8. orbital speed

surface marking distinguished by reflectivity differences

moon orbiting a minor planet

velocity of an orbiting object

speed at which star's equator becomes unstable

9. blazar

active galactic nucleus with jet pointing toward Earth

Moon's visible shape over a month

vast supercluster including the Milky Way

orbital parameter for small bodies

10. starburst galaxy

365.25 days in astronomical calendar

small star with brightness variation

imaginary sphere with stars fixed on its inside

galaxy with exceptionally high star formation

11. interstellar reddening

rotating disk of matter spiraling into a celestial body

Earth's rotation period relative to stars

star light reddening caused by dust

alignment of celestial bodies in apparent line

12. periapsis

small planetary object orbiting Sun

closest point in orbit

protoplanetary disk around a young star

vast group of connected galaxies

13. orbital elements

building block of a planet

parameters defining an orbit

measure of star's color and temperature differences

orbital ratio of two bodies with simple integer ratio

14. secular motion

closest distance a moon can approach without breakup

network or complex system of interconnected parts

slow, continuous movement of celestial objects

smaller galaxy orbiting a larger one

15. azimuth

celestial objects like planets

compass angle of an object from a reference direction

distance from Sun's center to surface

study of celestial positions

16. cosmic microwave background

sky coordinate system centered on the galaxy

dimming near a star's limb

thermal radiation from early universe

measure of light absorption

17. orbital node

small, low-mass star, often red or brown

phase of stellar evolution for large stars

reflectivity of a celestial body based on geometry

point where orbit crosses ecliptic

18. star cluster

time between consecutive alignments

object emitting high-energy radiation

study of objects outside our galaxy

group of stars gravitationally bound

19. geocentric

study of objects in infrared spectrum

measure of size or brightness

centered on Earth

star's movement across the sky over time

20. isochrone

measure of light absorption

curve representing stars of same age

time for an object to complete one spin

actual position of orbiting body

Vocabulary Quiz:

1. supernova

2. geocenter

3. tidal stream

4. polar orbit

5. stellar parallax

6. binary star

7. astronomical object

8. orbital speed

9. blazar

10. starburst galaxy

11. interstellar reddening

12. periapsis

13. orbital elements

14. secular motion

15. azimuth

16. cosmic microwave background

17. orbital node

18. star cluster

19. geocentric

20. isochrone

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. supernova

2. geocenter

3. tidal stream

4. polar orbit

5. stellar parallax

6. binary star

7. astronomical object

8. orbital speed

9. blazar

10. starburst galaxy

11. interstellar reddening

12. periapsis

13. orbital elements

14. secular motion

15. azimuth

16. cosmic microwave background

17. orbital node

18. star cluster

19. geocentric

20. isochrone

Select vocabulary category you want to browse:

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