ASTRO 1401 LAB FINAL EXAM REVIEW SOLVED #1
Convert the following from Scientific Notation: 8.59x10 ⁶ - correct answer 8590000
Convert the following number from Scientific Notation: 6.35x10 ⁹ - correct answer
6350000000
Which of the following SI units could be used to measure the ambient temperature? -
correct answer Kelvin
Do the following conversion from m to Gm: 9,780,000,000 m - correct answer 9.78 Gm
1 Meter= 1.0E-9 Gm
1Gm= 1000000000m
When can we say that a number is written in scientific notation? - correct answer When
a number between 1 and 10 is multiplied by a power of 10
Which of the following coordinate system is observer centered? - correct answer
Horizontal (Altitude/ Azimuth)
Which would be the azimuth of an object in degrees if it is located 20° South and West?
- correct answer 250°
West= 270°, so 20° South of West= 270°- 20°= 250°
Which of the following functions is NOT a function of Stellarium? - correct answer Get
the weather conditions to plan an observation
Which is the imaginary line that divides the celestial sphere into two equal halves? -
correct answer Celestial equator
The celestial equator divides the celestial sphere into two equal halves.
Equator comes from Equal
What is the angular distance in Hours, minutes, and seconds measured along the
celestial equator going eastward starting from the vernal equinox? - correct answer
Right Ascension
How many arcminutes are equal to 0.6 degrees? - correct answer 36'
1degree= 60 arcminutes, so 0.6 degrees= 60*(0.6)= 36'
, Which of the following types of optical telescopes have a primary mirror? - correct
answer Reflector
Reflector telescopes work under the principle of reflection and have a primary mirror
and a secondary mirror
What is the instrument built to detect gravitational waves? - correct answer LIGO
The Laser Interferometer Gravitational- Wave Observatory is the instrument built to
detect gravitational waves
How many arcseconds are equal to 0.5 degrees - correct answer 1800"
Since 1 degree= 3600" then 0.5 degrees = 3600"/ 2 =1800"
Are radio waves considered electromagnetic radiation? - correct answer Yes
Which of the following objects look DIMMER in the sky? - correct answer Object 3:
Apparent magnitude: 10
The larger the magnitude, the dimmer the object is
The smaller the magnitude, the brighter the object is
Around which point in the northern sky, the stars appear to be revolving? - correct
answer North Celestial Pole
What refers to the turbulence caused due to temperature and wind fluctuations in layers
of the atmosphere? - correct answer Seeing
Which is the reason why most of the professional optical observatories are located at
the top of mountains or in desertic places? - correct answer Better Seeing
Since we are forced to look through the atmosphere, which can seriously degrade the
quality of the image.
Use the appropriate formula to calculate the airmass that the light has to pass through if
the altitude of an object is 50° - correct answer 1.305
Air mass= 1/cos(ZA°)
ZA= zenith angle (how far away from directly overhead the sun is).
Z= 90°- 50°= 40°
1/cos(40°)= 1.305
Is the Moon a sphere which is always half- illuminated? - correct answer Yes
Select the four primary lunar phases - correct answer New Moon
Convert the following from Scientific Notation: 8.59x10 ⁶ - correct answer 8590000
Convert the following number from Scientific Notation: 6.35x10 ⁹ - correct answer
6350000000
Which of the following SI units could be used to measure the ambient temperature? -
correct answer Kelvin
Do the following conversion from m to Gm: 9,780,000,000 m - correct answer 9.78 Gm
1 Meter= 1.0E-9 Gm
1Gm= 1000000000m
When can we say that a number is written in scientific notation? - correct answer When
a number between 1 and 10 is multiplied by a power of 10
Which of the following coordinate system is observer centered? - correct answer
Horizontal (Altitude/ Azimuth)
Which would be the azimuth of an object in degrees if it is located 20° South and West?
- correct answer 250°
West= 270°, so 20° South of West= 270°- 20°= 250°
Which of the following functions is NOT a function of Stellarium? - correct answer Get
the weather conditions to plan an observation
Which is the imaginary line that divides the celestial sphere into two equal halves? -
correct answer Celestial equator
The celestial equator divides the celestial sphere into two equal halves.
Equator comes from Equal
What is the angular distance in Hours, minutes, and seconds measured along the
celestial equator going eastward starting from the vernal equinox? - correct answer
Right Ascension
How many arcminutes are equal to 0.6 degrees? - correct answer 36'
1degree= 60 arcminutes, so 0.6 degrees= 60*(0.6)= 36'
, Which of the following types of optical telescopes have a primary mirror? - correct
answer Reflector
Reflector telescopes work under the principle of reflection and have a primary mirror
and a secondary mirror
What is the instrument built to detect gravitational waves? - correct answer LIGO
The Laser Interferometer Gravitational- Wave Observatory is the instrument built to
detect gravitational waves
How many arcseconds are equal to 0.5 degrees - correct answer 1800"
Since 1 degree= 3600" then 0.5 degrees = 3600"/ 2 =1800"
Are radio waves considered electromagnetic radiation? - correct answer Yes
Which of the following objects look DIMMER in the sky? - correct answer Object 3:
Apparent magnitude: 10
The larger the magnitude, the dimmer the object is
The smaller the magnitude, the brighter the object is
Around which point in the northern sky, the stars appear to be revolving? - correct
answer North Celestial Pole
What refers to the turbulence caused due to temperature and wind fluctuations in layers
of the atmosphere? - correct answer Seeing
Which is the reason why most of the professional optical observatories are located at
the top of mountains or in desertic places? - correct answer Better Seeing
Since we are forced to look through the atmosphere, which can seriously degrade the
quality of the image.
Use the appropriate formula to calculate the airmass that the light has to pass through if
the altitude of an object is 50° - correct answer 1.305
Air mass= 1/cos(ZA°)
ZA= zenith angle (how far away from directly overhead the sun is).
Z= 90°- 50°= 40°
1/cos(40°)= 1.305
Is the Moon a sphere which is always half- illuminated? - correct answer Yes
Select the four primary lunar phases - correct answer New Moon
