Vocabulary Quiz - VocabForce

1. galaxy cluster

baseline for celestial coordinate measurement

brightness change due to rotation

group of multiple galaxies bound by gravity

planet appears to move backward in sky

2. elliptical orbit

star pair detected via spectra shifts

moon of a moon; hypothetical or minor

theoretical study of celestial phenomena

path of celestial body around another in ellipse

3. orbital node

point where orbit crosses ecliptic

radius of a celestial object as seen from Earth

Moon's visible shape over a month

distant comet reservoir in space

4. synodic period

time between consecutive alignments

speed moving along a circular path

gas cloud with molecules, star-forming

astronomical object catalog

5. moving cluster

point where orbit crosses ecliptic

measure of star's color and temperature differences

stars moving together through space

Earth's orbit period relative to stars

6. naked eye

star pair detected via spectra shifts

telescope mounted on an aircraft or balloon for observations

visible without telescope

shorter diameter of an ellipse

7. positional astronomy

orbit with period equal to Earth's rotation

study of celestial positions

planet orbiting a star outside the solar system

region where a body’s gravity dominates

8. tilt erosion

loss of axial tilt over time

objects orbiting inside Neptune's orbit

apparent movement of celestial objects along the sky

celestial coordinate system based on Earth's equator

9. sky

bright, dense center of a galaxy

sky visible during nighttime

measurement of celestial object positions and motions

expanse of space visible from Earth's surface

10. hypergalaxy

abundance of elements heavier than helium

dense central core of a galaxy or star cluster

axial tilt of a planet or star

vast group of connected galaxies

11. Laniakea Supercluster

centered around the Sun

gaseous interstellar cloud

vast supercluster including the Milky Way

early stage star still gathering mass

12. pulsar

angular distance north or south of celestial equator

highly magnetized rotating neutron star emitting beams

distant icy body region beyond Neptune

celestial longitude coordinate

13. transit

Moon's visible shape over a month

object passes in front of a star

vast group of connected galaxies

acceleration due to gravity at Earth's surface

14. Tully–Fisher relation

distance light travels in one year

galaxy luminosity and rotation link

orbit passing over Earth's poles

orbit aligning with a body's rotation

15. observational astronomy

measure of star's color and temperature differences

point where orbit crosses ecliptic

study via telescopes

earth's orbit-based year length

16. exobiology

wide-angle imaging for X-ray telescopes

closest distance a moon can approach without breakup

instantaneous orbital ellipse

study of life beyond Earth

17. plane of reference

object emitting high-energy radiation

changes a star undergoes over time

standard plane for measurements

star's movement across the sky over time

18. quasar

early stage star still gathering mass

extremely luminous distant active galaxy nucleus

expanse of space visible from Earth's surface

star used as reference for measurements or calibration

19. First Point of Aries

highest point in satellite orbit around Earth

vernal equinox point marking celestial coordinates

sky coordinate system centered on the galaxy

angle between a body's orbit and reference plane

20. supernova

relating to planets

90-degree phase angle between celestial objects

massive stellar explosion

star not part of a star cluster

Vocabulary Quiz:

1. galaxy cluster

2. elliptical orbit

3. orbital node

4. synodic period

5. moving cluster

6. naked eye

7. positional astronomy

8. tilt erosion

9. sky

10. hypergalaxy

11. Laniakea Supercluster

12. pulsar

13. transit

14. Tully–Fisher relation

15. observational astronomy

16. exobiology

17. plane of reference

18. quasar

19. First Point of Aries

20. supernova

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. galaxy cluster

2. elliptical orbit

3. orbital node

4. synodic period

5. moving cluster

6. naked eye

7. positional astronomy

8. tilt erosion

9. sky

10. hypergalaxy

11. Laniakea Supercluster

12. pulsar

13. transit

14. Tully–Fisher relation

15. observational astronomy

16. exobiology

17. plane of reference

18. quasar

19. First Point of Aries

20. supernova

Select vocabulary category you want to browse:

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