Vocabulary Quiz - VocabForce

1. barycenter

center of mass of two or more orbiting bodies

intense burst of solar radiation

time for an object to complete one spin

object not massive enough to be star

2. inferior planet

rapid fluctuation of star brightness

deep-sky astronomical object catalog

planet closer to the Sun than Earth

relating to planets

3. solar radius

physics governing celestial bodies and universe

distance from Sun's center to surface

central dense region of a spiral galaxy

moon orbiting a minor planet

4. flare star

highest point a celestial object reaches in sky

angle between rotational axis and orbital plane

star exhibiting sudden brightness increases

gradual change in a celestial body's axis orientation

5. photometric system

constellation belt along ecliptic

intensity measurement framework

plane containing the total angular momentum of system

alignment of celestial bodies in apparent line

6. solar granule

daily apparent movement of stars due to Earth's rotation

mass range where exoplanets are rare

small convective cell on the Sun's surface

orbit aligning with a body's rotation

7. small Solar System body

galaxy with exceptionally high star formation

study of galaxies and their structures

minor celestial object like asteroid or comet

large planet with icy composition, e.g., Neptune

8. lunar

relating to the Moon

star pair detected via spectra shifts

intense, brief emission of gamma rays from space

group of multiple galaxies bound by gravity

9. massive compact halo object

gradual change in a celestial body's axis orientation

hypothetical dark matter candidate

early stage star still gathering mass

distance light travels in one year

10. giant planet

material around star from collisions or remnants

direction opposite the Galactic Center

point where orbit crosses celestial plane heading south

large planet like Jupiter or Saturn

11. Am star

dense remnant of supernova

protoplanetary disk around a young star

rotating disk of material around a young star

chemically peculiar star with strong metal lines

12. artificial satellite

human-made object orbiting a planet or star

shorter diameter of an ellipse

mass bends light from distant objects

dense stellar remnant like white dwarf or neutron star

13. orbital period

time for one orbit

outer layer of a star

active galactic nucleus with jet pointing toward Earth

moon with no regular pattern or orbit

14. Jeans instability

contraction under gravity forming stars or structures

large celestial body orbiting a star

direction opposite the Galactic Center

cloud of gas collapses under gravity

15. meteorite

meteor that hits Earth's surface

celestial body outside our solar system

stars moving together through space

part of Sun obscured

16. osculating orbit

object emitting high-energy radiation

theory of universe's origin and formation

hypothetical dark matter candidate

instantaneous orbital ellipse

17. microvariable

small star with brightness variation

period between recurring celestial configurations

star's movement across the sky over time

table listing astronomical object positions over time

18. constellation

recognized pattern of stars forming mythic shapes

Earth's rotation period relative to stars

relating to the Moon

stream of charged particles from Sun

19. solar facula

central dense region of a spiral galaxy

star and its planets or companions

luminous celestial body made of hot gases

bright area on the Sun's surface

20. astronomy

rotating disk of matter spiraling into a celestial body

scientific study of celestial objects and phenomena

relating to the Moon

thermal radiation from early universe

Vocabulary Quiz:

1. barycenter

2. inferior planet

3. solar radius

4. flare star

5. photometric system

6. solar granule

7. small Solar System body

8. lunar

9. massive compact halo object

10. giant planet

11. Am star

12. artificial satellite

13. orbital period

14. Jeans instability

15. meteorite

16. osculating orbit

17. microvariable

18. constellation

19. solar facula

20. astronomy

Select vocabulary category you want to browse:

Vocabulary Quiz:

1. barycenter

2. inferior planet

3. solar radius

4. flare star

5. photometric system

6. solar granule

7. small Solar System body

8. lunar

9. massive compact halo object

10. giant planet

11. Am star

12. artificial satellite

13. orbital period

14. Jeans instability

15. meteorite

16. osculating orbit

17. microvariable

18. constellation

19. solar facula

20. astronomy

Select vocabulary category you want to browse:

CEFR

GRE

IELTS

SAT

Science

TOEFL

TOEIC