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DSST Astronomy - Deck 1 questions and answers rated A+ 2025/2026
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DSST Astronomy - Deck 1 questions and answers rated A+ 2025/2026
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DSST Astronomy - Deck 1Parallax - ANSAn apparent shift in a celebrity's position relative to the celebrities round it.
This perceived shift is due to movement on Earth's surface as it rotates around the sun.
Scientific Method - ANSAn ordered system for discovering new know-how that relies on
statement, explanation, prediction, and experimentation.
Occam's Razor - ANSA hassle-solving precept that says the handiest solution to a hassle is
maximum probable to be accurate.
Theory - ANSA testable prediction primarily based on actual-international observations.
Ptolemaic Model - ANSAn early rendering of the universe that positioned a wonderfully
spherical version of Earth at its middle
Heliocentric Model - ANSAn early rendering of the universe that placed our Sun at the center
in preference to Earth.
Galilean Moons - ANSThe moons of Jupiter, which have been originally mistaken for planets.
Kepler's First Law - ANSPlanets orbit in elliptical styles with the sun at their middle.
Kepler's Second Law - ANSA line connecting any planet to the solar might sweep over equal
regions in equal quantities of time.
Kepler's Third Law - ANSThe square of a planet's orbital length is proportionate to the cube
of the semi-main axis of its orbit.
Newton's First Law - ANSAn item at rest or in motion will stay at relaxation or in motion
unless acted upon by using an outdoor pressure.
Newton's Second Law - ANSThe sum of all forces on an item is equal to the object's mass
times its acceleration.
Newton's Third Law - ANSWhen one frame exerts force upon every other the recipient
exerts a pressure of identical magnitude back inside the contrary direction.
Tangential Velocity - ANSThe speed of a celestial item because it passes through any other
object.
Escape Velocity - ANSThe velocity required for an object to pass with the aid of any other
without getting stuck in its subject of gravity.
, Conserved Quantities - ANSValues in a system that remain regular over the years.
Relativity: First Postulate - ANSThe laws of physics stay regular for all observers in uniform
movement relative to one another.
Relativity: Second Postulate - ANSLightspeed remains steady in a vacuum with the equal
fee for all observers no matter their relative movement.
Gravity - ANSThe curving of space-time round massive objects.
Gravitational Lensing - ANSThe bending of light by a massive object's field of gravity.
Constellation - ANSA institution of stellar objects inside the sky.
Ecliptic - ANSThe path of the Sun's orbit thru space.
Vernal Equinox - ANSThe time at which the Sun crosses the celestial equator touring from
north to south
Autumnal Equinox - ANSThe time at which the Sun crosses the celestial equator traveling
from south to north.
Summer Solstice - ANSWhen the Sun is at its furthest point north of the equator.
Winter Solstice - ANSWhen the Sun is at its furthest factor south of the equator.
Zodiacs - ANSThirteen constellations crossed through the Sun on its direction through area.
Parsec (computer) - ANSA unit of distance for an item with an annual parallax of 1
arcsecond.
Sidereal Period - ANSThe time it takes the Moon to complete its east-ward orbit of Earth
(27.Three days).
Synchronous Orbit - ANSWhen two celestial our bodies orbiting one another maintain the
same price of rotation.
Synodic Period - ANSThe time it takes for the Moon to complete one cycle (29.Five days).
Syzygy - ANSWhen the Moon and Earth are aligned with the Sun's gravitational pull.
Spring Tide - ANSA maximum tidal force created by the alignment of the Sun, Earth, and
Moon.
Neap Tide - ANSA minimal tidal pressure it is exerted while the Sun and Moon are 90° apart.
Lagrange Points - ANSAreas in which the gravitational pull of Earth is balanced with the aid
of that of the Moon.
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