Vocabulary Quiz - VocabForce

1. nova

gravity experienced at a celestial body's surface

stellar explosion increasing brightness

orbit beyond Neptune

relating to the Moon

2. interstellar medium

scientific study of celestial objects and phenomena

hot, ionized gas surrounding the galaxy

material between stars in a galaxy

high-speed jet from a galaxy or black hole

3. ecliptic

free-floating planetary-mass object

highest point a celestial object reaches in sky

plane of Earth's orbit around the Sun

astronomical object catalog

4. Tisserand's parameter

perspective from Earth's surface

orbital parameter for small bodies

visible without telescope

small convective cell on the Sun's surface

5. extrasolar object

celestial body outside our solar system

line dividing daylight and darkness

solar magnetic cycle explaining sunspot patterns

time between consecutive alignments

6. metallicity

planet orbiting a star outside the solar system

categorization of stars by spectrum

abundance of elements heavier than helium

study of planets

7. asteroid belt

small star with brightness variation

region between Mars and Jupiter with numerous asteroids

stellar explosion increasing brightness

study of life beyond Earth

8. geometric albedo

shorter diameter of an ellipse

high-energy particles from space impacting Earth

study of cosmic dust and its effects

reflectivity of a celestial body based on geometry

9. argument of periapsis

sky coordinate system centered on the galaxy

longest diameter of an elliptical orbit

angle from ascending node to periapsis in orbit

planet appears to move backward in sky

10. calibrator star

geology of planets and moons in the solar system

star used as reference for measurements or calibration

astronomical color measurement system

main celestial body in a system

11. artificial satellite

human-made object orbiting a planet or star

Moon's visible shape over a month

hot, blue, massive star with high surface temperature

imaginary line through Earth's poles

12. orbital inclination

small star with brightness variation

any physical entity in space observed visually or otherwise

spread of velocities in a system

tilt of orbit's plane

13. surface gravity

Moon's visible shape over a month

baseline for celestial coordinate measurement

gravity experienced at a celestial body's surface

variation proportional to square of position

14. semi-diameter

compass angle of an object from a reference direction

radius of a celestial object as seen from Earth

rotation speed leading to shape deformation or breakup

slowing rotation via gravitational forces

15. proplyd

related to equinoxes or occurring at equinoxes

great circle passing through zenith and poles

projection of Earth's equator onto celestial sphere

protoplanetary disk around a young star

16. standard gravity

chemically peculiar star with strong metal lines

star used as reference for measurements or calibration

acceleration due to gravity at Earth's surface

rotation aligning with orbital period

17. declination

angular distance north or south of celestial equator

center point of Earth's mass

method judging celestial distances with multiple steps

planets beyond Earth's orbit

18. hypergalaxy

planets beyond Earth's orbit

dense stellar remnant like white dwarf or neutron star

study of light spectra from objects

vast group of connected galaxies

19. heliosphere

rotating disk of matter spiraling into a celestial body

Sun's magnetic field extending into space

categorizing stars by spectra and brightness

group of hot, massive stars

20. ephemeris

any physical entity in space observed visually or otherwise

direction opposite the Galactic Center

moon cycle with predictable phases

table listing astronomical object positions over time

Vocabulary Quiz:

1. nova

2. interstellar medium

3. ecliptic

4. Tisserand's parameter

5. extrasolar object

6. metallicity

7. asteroid belt

8. geometric albedo

9. argument of periapsis

10. calibrator star

11. artificial satellite

12. orbital inclination

13. surface gravity

14. semi-diameter

15. proplyd

16. standard gravity

17. declination

18. hypergalaxy

19. heliosphere

20. ephemeris

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. nova

2. interstellar medium

3. ecliptic

4. Tisserand's parameter

5. extrasolar object

6. metallicity

7. asteroid belt

8. geometric albedo

9. argument of periapsis

10. calibrator star

11. artificial satellite

12. orbital inclination

13. surface gravity

14. semi-diameter

15. proplyd

16. standard gravity

17. declination

18. hypergalaxy

19. heliosphere

20. ephemeris

Select vocabulary category you want to browse:

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