Solar System

Question 1

Heavenly bodies located on a huge imaginary sphere called as

Answer 1

Celestial sphere

Question 2

Sun’s declination?

Answer 2

23.5deg NORTH to 23.5deg SOUTH

Question 3

Delhi and Mumbai latitude?

Answer 3

Delhi at 27deg north
Mumbai at 19-20deg north

Question 4

The pt on celestial sphere directly above the observer

Answer 4

Zenith

Question 5

Sun crosses Mumbai __ times a year (sun’s declination)

Answer 5

2

Question 6

Sun crosses Delhi ___times a year (sun’s declination)

Answer 6

0

Question 7

law which states each planet follows an elliptical path w the sun at one of the 2 focii points of the ellipse

Answer 7

kepler’s 1st law

Question 8

law which states planets sweep equal areas in equal interval of time
A1=A2

Answer 8

kepler’s 2nd law of planetory motion

Question 9

speed of planet will be FASTEST when

Answer 9

CLOSEST TO THE SUN

Question 10

speed of planet will be SLOWEST when

Answer 10

FARTHEST FROM SUN

Question 11

reason for season

Answer 11

inclination of the earth

Question 12

reason for day and night haviing diff duration

Answer 12

inclination of the earth

Question 13

Max declination range from
a)equator
b)poles

Answer 13

23.5deg
66.5deg

Question 14

when are the Rate of change of day and night greatest

Answer 14

greatest in
SPRING AND AUTUMN EQUINOX

Question 15

SUMMER SOLISTICE

Answer 15

JUNE 21

Question 16

WINTER SOLISTICE

Answer 16

DECEMBER 22

Question 17

PERIHELION (PAAS PAAS FROM SUN)

Answer 17

JAN 3

Question 18

APEHELION( farthest from sun)

Answer 18

JULY 3

Question 19

AUTUMN EQUINOX

Answer 19

SEPT 23

Question 20

SPRING EQUINOX

Answer 20

MARCH 21

Question 21

Periods bw successive transits of star over a meridian

Answer 21

SIDERIAL DAY ( MEASURED FROM DISTANT STAR)

Question 22

SIDERIAL DAY DURATION

Answer 22

23HRS 56MIN approx

Question 23

SIDERIAL YEAR

Answer 23

time taken by earth to orbit around sun measured against a distant star

Question 24

SIDERIAL YEAR duration

Answer 24

365days 6hrs

Question 25

APPARENT SOLAR DAY will be a constant value TRUE OR FALSE

Answer 25

FALSE. IT IS NOT A CONSTANT VALUE

Question 26

APPARENT SOLAR DAY( MEASURED FROM REAL SUN) DURATION

Answer 26

VARIES FROM 23 HRS 44MIN TO 24HRS 14MIN

Question 27

MAX DIFF from 24hrs is MAX diff of apparent day from mean solar day is

Answer 27

16 MINUTES (EQUATION OF TIME)

Question 28

EQUATION OF TIME HAPPENS IN THE MONTHS

Answer 28

NOVEMBER AND FEBRUARY

Question 29

Mean solar day ( hypothetical situation)

Answer 29

where it is asssumed that sun revolves around the earth at uniform speed in a circular orbit

Question 30

MEAN SOLAR DAY DURATION

Answer 30

24HRS

Question 31

APPARENT SOLAR DAY MAY BE ___ OR ___ THAN MEAN SOLAR DAY

Answer 31

LONGER OR SHORTER

Question 32

TROPICAL YEAR OR APPARENT SOLAR YEAR DURATION

Answer 32

365days 5hrs 48.75min

Question 33

Calender year duration

Answer 33

365 days

Question 34

every ___th year is a leap year

Answer 34

400th

Question 35

period before sunrise and after sunset when light is seen or remains is called

Answer 35

Twilight

Question 36

A)civil twilight ranges B)nautical twilight C)astronomical twilight

Answer 36

A)b/w sunset and when the centre of sun is 6 deg below sensible horizon B)sun bw 6deg to 12deg below horizon C)sun bw 12 deg to 18 deg below horizon

Question 37

inc in altitude, twilight__

Answer 37

decreases. since early sunrise and late sunset

Question 38

inc in latitude, twilight ___

Answer 38

increases.

Question 39

plane of earth's orbit around sun

Answer 39

plane of ECLIPTIC

Question 40

plane of the equator

Answer 40

plane of EQUINOCTICAL

Question 41

duration of day and night is determined by

Answer 41

DECLINATION

Question 42

SUN CROSSES EQUATOR ___ A YEAR

Answer 42

TWICE

Question 43

SUN'S DECLINATION CHANGES ANNUALLY BW

Answer 43

23.5deg NORTH( SUN OVERHEAD TROPIC OF CANCER) to 23.5deg SOUTH (SUN OVERHEAD TROPIC OF CAPRICON)

Question 44

THE PLANE OF ECLIPTIC AND THE PLANE OF EQUINOCTICAL ARE INCLINED TO EACH OTHER AT AN ANGLE

Answer 44

23.5 DEG

Question 45

Plane of ecliptic and plane of equinoctial are inclined to each other at an angle of ?

Answer 45

23.5 deg

Question 46

At what times of the year does length of hrs of daylight change most rapidly

Answer 46

Spring and autumn equinox

Question 47

Which is the highest latitude at which the sun will rise above the horizon and set every day

Answer 47

66deg N/S

Question 48

Highest latitude at which sun will reach and angle of 90deg above the horizon at some time during the year