Vocabulary Quiz - VocabForce

1. effective temperature

large planet composed mainly of gases

temperature of a blackbody emitting the same radiation.

star observed through Earth's atmosphere

study of light spectra from objects

2. corona

sun's outer atmosphere visible during eclipses

line connecting closest and farthest points in orbit

faint glow from dust in solar system

instantaneous orbital ellipse

3. astrodynamics

study of motion of celestial bodies and spacecraft

time from one sunrise to the next

observable boundary of the sky

perspective from Earth's surface

4. accretion disk

large, bright cloud of plasma in Sun's atmosphere

rotating disk of matter spiraling into a celestial body

study of celestial objects at submm wavelengths

study of light spectra from objects

5. argument of periapsis

distant small Solar System body outside Neptune's influence

angle from ascending node to periapsis in orbit

great circle passing through zenith and poles

observed minus calculated data

6. solar facula

event marking start of fall in northern hemisphere

stellar explosion increasing brightness

reflectivity of a surface, ratio of reflected to incident light

bright area on the Sun's surface

7. reference plane

process of dominating surrounding space in orbit

pair of stars appearing close in the sky

baseline for celestial coordinate measurement

intensity measurement framework

8. meridian astronomy

magnetic arc of plasma in the solar corona

study of celestial meridians

theoretical framework of star development

small convective cell on the Sun's surface

9. stellar designation

official naming of stars

Sun's apparent path

dimming near a star's limb

region beyond Earth's atmosphere

10. sidereal year

dense remnant of supernova

recognizable pattern of stars within a constellation

Earth's orbit period relative to stars

star with changing brightness

11. planetoid

leftover core after a star's death

small planetary object

standard plane for measurements

instrument for observing distant objects

12. nuclear star cluster

variation proportional to square of position

compact star group at galaxy center

dust and gas ring around a star or planet

free-floating planet not orbiting a star

13. meteoroid

axial tilt of a planet or star

space rock in Earth's atmosphere

any physical entity in space observed visually or otherwise

theoretical study of celestial phenomena

14. field of view

distant astronomical objects beyond solar system

observable sky area through an instrument

measure of light absorption

small planetary object

15. XBONG

direction opposite the Galactic Center

degree of stretching or lengthening

loss of axial tilt over time

X-ray bright optically normal galaxy

16. near-Earth object

asteroid or comet close to Earth

one celestial body blocking another

free-floating planet not orbiting a star

reflectivity of a surface, ratio of reflected to incident light

17. gamma-ray astronomy

great circle passing through zenith and poles

moon cycle with predictable phases

study of universe using gamma-ray observations

smaller collection of galaxies in a cluster

18. ecliptic

plane of Earth's orbit around the Sun

thermal radiation from early universe

extremely luminous distant active galaxy nucleus

magnetic arc of plasma in the solar corona

19. morning width

gradual change in a celestial body's axis orientation

rapid fluctuation of star brightness

reflectivity of a surface, ratio of reflected to incident light

spatial extent of morning astronomical phenomena

20. neutrino

star with faint spectral lines

chemically peculiar star with strong metal lines

elusive subatomic particle

sky coordinate system centered on the galaxy

Vocabulary Quiz:

1. effective temperature

2. corona

3. astrodynamics

4. accretion disk

5. argument of periapsis

6. solar facula

7. reference plane

8. meridian astronomy

9. stellar designation

10. sidereal year

11. planetoid

12. nuclear star cluster

13. meteoroid

14. field of view

15. XBONG

16. near-Earth object

17. gamma-ray astronomy

18. ecliptic

19. morning width

20. neutrino

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. effective temperature

2. corona

3. astrodynamics

4. accretion disk

5. argument of periapsis

6. solar facula

7. reference plane

8. meridian astronomy

9. stellar designation

10. sidereal year

11. planetoid

12. nuclear star cluster

13. meteoroid

14. field of view

15. XBONG

16. near-Earth object

17. gamma-ray astronomy

18. ecliptic

19. morning width

20. neutrino

Select vocabulary category you want to browse:

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