Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Astronomy 109-05 > Astronomy 109 Lab 1-5 Midterm Fall 2022 > Flashcards

Astronomy 109 Lab 1-5 Midterm Fall 2022 Flashcards

1
Q

Scientific Notation: when the decimal is moved to the left the exponent is?

A

positive or +

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Scientific Notation: when the decimal is moved to the right the exponent is?

A

negative or -

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Scientific Notation: what is a million and prefix?

A

10^6, mega

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Scientific Notation: what is a billion and prefix?

A

10^9, giga

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Scientific Notation: what is a trillion and prefix?

A

10^12, tetra

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Scientific Notation: what is a millionth and prefix?

A

10^-6, micro

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Scientific Notation: what is a billionth and prefix?

A

10^-9, nano

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Scientific Notation: what is a trillionth and prefix?

A

10^-12, pico

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is one degree equal in arcminutes?

A

60’ arcminutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is 1’ or 1 arcminute?

A

60” arcseconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Astronomical Unit ( AU):

A

-used to express the average distance between earth and sun
- distance between earth and sun= 1 AU

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is 1 AU in miles and kilometers?

A
  • kilometers:1.49x10^8
    -miles: 9.29x10^7
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Light year (ly):

A

the distance that light travels in a year, used to expressed distances of nearby stars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Celestial Sphere:

A

dome in which we see the sky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Declination ( DEC):

A

the angular distance of how high or low something is to the equator, analogous to latitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Right ascension ( RA):

A

measured along the eastward equator, measured in time, ranges from zero point to vernal equinox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the equatorial co-coordinate system?

A

right ascension and declination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Parts of the celestial sphere
- Horizon:

A

the apparent line that separates earth from the sky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Parts of the celestial sphere
-Zenith:

A

the point directly overhead on the celestial sphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Parts of the celestial sphere
-Meridian:

A

is the great circle passing through the zenith, due north and south points on the observers horizon, a star reaches its maximum height above the horizon when its on the median

21
Q

Parts of the celestial sphere
- celestial poles:

A

the projection of the earths poles onto the celestial sphere

22
Q

Parts of the celestial sphere
- celestial equator:

A

an extension of the earths equator onto the celestial sphere

23
Q

Azimuth:

A

the angle measured eastward from the true north to the point of the horizon below the star and ranges from 0 degrees to 300 degrees

24
Q

Altitude:

A
  • how far above the horizon an object is seen in the sky
  • altitude of Polaris = observers latitude ( in northern hemisphere )
25
Q

What is Horizon Co-ordinate System?

A

Altitude and Azimuth

26
Q

Constellation:

A

-pattern/groupings of stars named after
mythological animals, “characters” or objects
-examples: Andromeda, Perseus, Crux, Orion

27
Q

Asterisms:

A

-Asterisms are the shapes within the
constellations, sometimes patterns are also formed by stars
in different constellations.
-example: The Big Dipper in the constellation Ursa Major,
Summer Triangle, Winter Triangle

28
Q

Never-Set Stars:

A

DEC > 90 – LAT

29
Q

Never-Rise Stars:

A

DEC < -90 + LAT

30
Q

Rising/Setting Stars:

A

DEC < 90 – LAT and DEC > -90+ LAT

31
Q

What is the importance of Polaris: the pole star?

A
  1. Polaris indicates the direction of true north as it sits on the NCP
  2. Altitude of Polaris = Observer’s Latitude (In Northern Hemisphere)
32
Q

Parallax:

A

is the apparent shift in position of an object when the observer
views it from two different lines of sight

33
Q

distance:

A

r to a celestial object

34
Q

Finding the distance: r to a celestial object using the small angle formula:

A

Small-Angle Formula: r=(206265”)(d) divided by (a)

35
Q

what does d represent in the small angle formula for finding distance?

A

where d is the separation between two perspectives

36
Q

what does a represent in the small angle formula for finding distance?

A

𝛼 is the parallax angle in arcseconds

37
Q

true or false: do you have to convert a into arcseconds in small angle formula for finding distance?

A

true

38
Q

Finding the diameter: formula for celestial objects using the small angle formula

A

𝒅= (r)(a) divided by (206265”)

39
Q

what does r represent in the small angle formula for finding diameter?

A

where r is the distance to the celestial object

40
Q

what does a represent in the small angle formula for finding diameter?

A

𝛼 is the angular diameter of the object in arcseconds.

41
Q

true or false: do you have to convert a into arcseconds in the small angle formula for finding diameter?

A

true

42
Q

what is the formula for finding the mass of Jupiter?

A

Mjupiter=(4)(pi^2)(d)^3 divided by (G)(P)^2

43
Q

what does P stand for in the formula for finding the mass of Jupiter?

A

-(seconds)^2
- is the orbital period of the moon in units of seconds

44
Q

what does D stand for in the formula for finding the mass of Jupiter?

A

-(meters)^3
- orbital size/distance of the Jupiter’s moon in units of meters

45
Q

what does G represent in the formula for finding the mass of Jupiter?

A

-G is the gravitational constant
- 6.673x10^-11 m^3/kg/s^2

46
Q

what is the formula for finding the volume of celestial objects?

A

V=(4/3)(pi)(R)^3

47
Q

what does r represent in the formula for finding volume of celestial objects?

A

where R is the radius of the object in meters

48
Q

what star is in the summer triangle?

A

vega

49
Q

what star is in the winter triangle?

A

Sirius

Astronomy 109-05 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions