არჩეულ კატეგორიებში არ არის საკმარისი ლექსიკა ვიქტორინის დასაწყებად.

Vocabulary Quiz:

1. sidereal time

point where Earth's axis intersects celestial sphere

star exhibiting sudden brightness increases

time based on Earth's rotation relative to stars

visible without telescope

2. Oort cloud

direction opposite the Galactic Center

temperature of a blackbody emitting the same radiation.

luminous celestial body made of hot gases

distant comet reservoir in space

3. sidereal day

closest point of planet to Sun

Earth's rotation period relative to stars

highest point in the sky directly overhead

cool, less luminous star, often red

4. plane of reference

study of light spectra from objects

standard plane for measurements

Sun's magnetic field extending into space

central dense region of a spiral galaxy

5. Messier object

deep-sky astronomical object catalog

protoplanetary disk around a young star

process of dominating surrounding space in orbit

star used as reference for measurements or calibration

6. Laniakea Supercluster

planet closer to the Sun than Earth

vast supercluster including the Milky Way

initial astronomical observation of a telescope

star not part of a star cluster

7. ionosphere

stars in a galaxy's flat disk

gravitational locking of orbits

meteor that hits Earth's surface

Earth's atmosphere layer ionized by solar radiation

8. H II region

asteroid or comet close to Earth

cloud of ionized hydrogen gas

relating to planets

speed toward or away from observer

9. surface gravity

recognizable pattern of stars within a constellation

gravity experienced at a celestial body's surface

dense remnant of supernova

rotating disk of material around a young star

10. orbit

path of a star or galaxy over time

path of celestial object around a star

temperature of a blackbody emitting the same radiation.

small convective cell on the Sun's surface

11. spherical astronomy

line dividing daylight and darkness

study of celestial spheres and coordinates

Earth's orbit period relative to stars

active galactic nucleus with jet pointing toward Earth

12. elliptical orbit

large planet composed mainly of gases

highest point a celestial object reaches in sky

path of celestial body around another in ellipse

theoretical framework of star development

13. red-giant branch

stars beginning hydrogen fusion

point where Earth's axis intersects celestial sphere

celestial body outside our solar system

phase of stellar evolution for large stars

14. equatorial coordinate system

curve representing stars of same age

angle between rotational axis and orbital plane

celestial coordinate system based on Earth's equator

highly magnetized rotating neutron star emitting beams

15. azimuth

dense remnant of supernova

planets beyond Earth's orbit

compass angle of an object from a reference direction

bright streak from atmospheric entry

16. moonmoon

material around star from collisions or remnants

vernal equinox point marking celestial coordinates

visible distribution of stars in the sky

moon of a moon; hypothetical or minor

17. orbital period

orbit passing over Earth's poles

region visible from Earth

time for one orbit

theory of multiple universes

18. common proper motion

highest point in satellite orbit around Earth

Earth's natural satellite

large celestial body orbiting a star

stars moving together through space

19. zenith

study of cosmic dust and its effects

highest point in the sky directly overhead

path of celestial body around another in ellipse

time when day and night are equal in length

20. astrometry

imaginary line around which an object spins

stream of charged particles from Sun