question

186,000 miles per second

answer

speed of light

question

the distances to bodies in the solar system are a few light minutes to light hours

answer

true

question

it was aristotle who used the scientific method to show the earth was a sphere

answer

true

question

constellations are close clusters of stars, all at about the same distance from the sun

answer

false

question

from the south pole Polaris would appear directly overhead

answer

false

question

only at the equator are all the stars visible over the course of the year

answer

true

question

over the course of a night Polaris moves less than any other visible star in the sky

answer

true

question

there are 3,600 arc seconds in a degree

answer

true

question

a star with a right ascension of 2.6 hours will rise 2.6 hours after the vernal equinox

answer

true

question

in general the brightest star in a given constellation is designated as alpha

answer

true

question

the south celestial pole is located at a declination of -90 degrees

answer

true

question

at apogee the moon is at its farthest from earth and thus appears smaller than normal because of this it can produce only annular solar eclipses, but not total solar eclipses.

answer

true

question

The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon.

answer

lunar eclipse

question

occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth

answer

solar eclipse

question

from earth, the sun and moon have about the same angular diameter

answer

true

question

the full moon rises at sunrise and sets at sunset

answer

false

question

from full moon to third quarter moon takes about a week.

answer

true

question

the first quarter moon will rise about noon and set about midnight

answer

true

question

as it orbits the earth , the moon appears to move eastward about its own diameter every hour

answer

true

question

the parallax shift of a star would be greater if viewed from mars than from earth

answer

true

question

an apparent shift in the position of an object when viewed from different locations

answer

parallax

question

totality of all space, time, matter, and energy

answer

universe

question

study of the universe

answer

Astronomy

question

the distance light travels in a years

answer

about 10 trillion miles

question

these must be : Must be testable • Must be continually tested • Should be simple • Should be elegant

answer

scientific theories

question

observation leads to __- in the scientific method which then leads to ___

answer

theory, predictions

question

how many stars are visible at any one time? at any one time

answer

3000 stars

question

Figures having meaning to those doing the grouping

answer

constellations

question

invisible sphere that surrounds our earth that shows the locations of constellations, Is useful for locating objects in the sky.Stars seem to be on the inner surface of a sphere surrounding the Earth They aren't, but can use two-dimensional spherical coordinates (similar to latitude and longitude) to locate sky objects

answer

The celestial sphere

question

a full circle contains _____ degrees. each degree contains ___ arc minutes each arc minute contains ____arc seconds

answer

360, 60′, 60′′

question

Seasonal changes to night sky are due to ________________

answer

Earth's motion around Sun

question

Twelve constellations Sun moves through during the year are called the ______, path is ecliptic

answer

zodiac

question

• Combination of ______ and ________ gives seasons

answer

day length , sunlight angle

question

• Northernmost point of path (above celestial equator) is calledd the ____________, Day with the most hours of sunlight and the fewest hours of darkness

answer

summer solstice

question

southernmost point of path is called the ________, Occurs when the Sun is directly overhead at 23.5° south latitude, around December 21, and results in the minimum number of daylight hours for the northern hemisphere and the maximum number for the southern hemisphere.

answer

winter solstice

question

points where path crosses celestial equator are called the _____ and the ____________, Earth's axis of rotation is perpendicular to the line joining Earth to the Sun, so day and night are equal length

answer

vernal and autumnal equinoxes

question

Time from one vernal equinox to next is ______

answer

tropical year

question

rotation of Earth's axis itself; makes one complete circle in about 26,000 years

answer

Precession

question

Time for Earth to orbit once around Sun, relative to fixed stars, is ________, , the time required for Earth to complete one orbit around the Sun, relative to the stars

answer

sidereal year

question

Tropical year follows ________; sidereal year follows ________

answer

seasons, constellations

question

Moon takes about ________days to go through whole cycle of phases called a ____________.

answer

29.5 , synodic month

question

moon ______ are due to different amounts of sunlit portion being visible from Earth

answer

phases

question

Time to make full 360° rotation around Earth,is about 2 days shorter, The average period of revolution of the Moon around the Earth in reference to a fixed star, equal to 27 days, 7 hours, 43 minutes in units of mean solar time.

answer

sidereal month

question

a sidereal month is about __________ days shorter

answer

2

question

Eclipses don't occur every month because Earth's and Moon's orbits are not in the ________

answer

same plane

question

Measure baseline and angles, can calculate distance, a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart

answer

Triangulation

question

the period of time from which the sun is directly overhead until the next time the sun is directly overhead., From noontime to the next noontime; for Earth it is 24 hours.

answer

solar day

question

The period of revolution of the Moon with respect to the Sun; the length of one cycle of lunar phases; 29 1/2 Earth days., The period of revolution of the Moon with respect to the Sun; the length of one cycle of lunar phases. Also called the lunar month.

answer

Synodic month

question

Distances can be measured through ________ and ___________

answer

triangulation and parallax

question

Tropical year ≠ sidereal year, due to ____ of Earth's axis

answer

precession

question

Synodic month ≠ sidereal month, also due to earths ______ around sun

answer

rotation

question

Solar day ≠ sidereal day, due to Earth's _____ around sun.

answer

rotation

question

• Angle of Earth's axis causes _____

answer

seasons

question

Moon shines by reflected light, has ___

answer

phases

question

Plane of Earth's orbit around Sun is ___- at ____ degrees to celestial equator

answer

ecliptic, 23.5

question

Measuring Earth's radius: Done by _______ about 2300 years ago; noticed that when Sun was directly overhead in one city, it was at an _____in another

answer

Eratosthenes , angle

question

a slow motion of Earth's axis that traces out a cone over a period of 26,000 years

answer

precession

asro ch 1 – Space – Flashcards

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