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20 Nov
2020

1. Convert 1″ (1 arc-second) into radians. 2. D p Use the formula ”…

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1. Convert 1″ (1 arc-second) into radians. 2. D p Use the formula ” = 1 AU ” to find how many kilometers are in one parsec 3. What will be the stellar parallax angle of a star that is 2 parsecs away?4. A star has a stellar parallax angle of 0.1″. How far away is it?5. A star is at a distance of 250 parsecs. Its stellar parallax is 6. A star has a stellar parallax of 0.025″. Its distance is
Imagine that astronomers have discovered intelligent life in a nearby star system. Imagine you are part of a group submitting
Imagine that astronomers have discovered intelligent life in a nearby star system. Imagine you are part of a group submitting a proposal for who on Earth should speak for the planet and what fifty word message should be conveyed. (A) Who should speak for Earth and why?(B) What should this person say in fifty words?(C) Why is this message the most important compared to other things that could be said?
Facing south and looking up, how do the stars generally seem to be moving?1 options:Toward the east Toward the
Facing south and looking up, how do the stars generally seem to be moving?Question 1 options:Toward the east Toward the westToward the northToward the southQuestion 2 (2 points) As the stars move, they maintain the same…(Check the J2000 for declination and right-ascension coordinates.)Question 2 options:altitude.azimuth.right-ascension.Question 3 (2 points) Now, turn and face north. How do the stars generally seem to be moving now?Question 3 options:Toward the eastToward the west.In a clockwise circular motion.In a counterclockwise circular motion.Question 4 (2 points) While still facing north, what is the star near the center of the motion?Question 4 options:AlcorMizarPolarisVegaQuestion 5 (2 points) What does the Earth do that makes the stars appear to do this type of motion?Question 5 options:Earth’s rotation on its axis.Earth’s revolution around the Sun.Precession of Earth’s axis.Question 6 (2 points) How do the stars’ positions shift each day?Question 6 options:Toward the eastToward the westToward the southToward the northQuestion 7 (2 points) What direction do you see the Sun moving against the backdrop of stars? (The easiest way to tell is to lock onto a star near the Sun and watch which direction the Sun moves with respect to this star.)Question 7 options:Toward the east.Toward the west.Toward the south.Toward the north.Question 8 (2 points) What does the Earth do that causes this apparent motion?Question 8 options:Earth’s rotation on its axisEarth’s revolution around the Sun.Precession of Earth’s axis.Question 9 (2 points) How has the position of Polaris, with respect to the North Celestial Pole, changed?Question 9 options:Polaris has moved toward the North Celestial Pole.Polaris has moved away from the North Celestial Pole.Question 10 (2 points) What motion does the Earth do to cause this apparent Change?Question 10 options:Earth’s rotation on its axisEarth’s revolution around the SunPrecession of Earth’s axisQuestion 11 (2 points) Mars is going in what direction with respect to the background stars? Be careful here. The whole sky shifts to the west, but how is Mars moving relative to those stars? (Again, lock onto a star that is near Mars and watch which direction the position of Mars changes with respect to this star.)Question 11 options:Toward the eastToward the westQuestion 12 (2 points) What direction is Mars going against the background of stars?Question 12 options:Toward the eastToward the westQuestion 13 (2 points) Referring to question 11, What is this kind of motion called?Question 13 options:Prograde motionWesterly driftRetrograde motionRadial motionQuestion 14 (2 points) What five planets do you see above the horizon? (Select all you find.)Question 14 options:MercuryVenusMarsJupiterSaturnUranusNeptuneQuestion 15 (2 points) What phase is the Moon?Question 15 options:First quarterFullWaning gibbousNewQuestion 16 (2 points) What event did you see?Question 16 options:Retrograde motion of the MoonPartial solar eclipseTotal solar eclipseTotal lunar eclipseQuestion 17 (2 points) Did you see the same event that you saw in Atlanta?Question 17 options:YesNoQuestion 18 (2 points) What event did you see?Question 18 options:Total solar eclipsePartial solar eclipse onlyannular solar eclipsetotal lunar eclipseQuestion 19 (2 points) About how long does totality last (between second contact and third contact)?Question 19 options:Just under 3 minutesAbout 40 minutesAbout 1.5 hoursAbout 3 hoursQuestion 20 (2 points) About how long does the entire eclipse last (from first-contact to fourth contact)?Question 20 options:Just under 3 minutesAbout 40 minutesAbout 1.5 hoursAbout 3 hoursQuestion 21 (2 points) The J2000 right-ascension (RA) and declination (DEC) of Markab is closest to…Question 21 options:RA: 23hr 04m, DEC: 15° 12’RA: 23hr 04m, DEC: -15° 12’RA: 15° 12′, DEC: 23hr 04mRA: -15° 12′, DEC: 23hr 04mQuestion 22 (2 points) The star on the square of Pegasus with nearly the same right-ascension as Markab is…Question 22 options:AlgenibScheatAlpheratzQuestion 23 (2 points) The star on the square of Pegasus with nearly the same declination as Markab is…Question 23 options:AlgenibSheatAlpheratz
1) You are looking at a nebula through a telescope. It is mostly white and blue-grey colors. What type of
1) You are looking at a nebula through a telescope. It is mostly white and blue-grey colors. What type of nebular are you most likely looking at.a. Emission Nebulab. reflection Nebulac. molecular cloud2) You are looking at a nebula shaped like a fish. There are bright reds and greens visible in the nebula. What type of nebula are you looking at?a. emission nebulab. reflection nebulac. molecular cloud3) Many nebulas are a combination of thin, brightly emitting colored gasses and dark cold dense clouds. An example is the dark horse shape of the horse head nebula. What type of gas cloud is the dark dense cold cloud?a. emission nebulab. reflection nebulac. molecular cloud4) before they condense into protostars, molecular cloud cores are warmer lumps that are found in what type of clouds?a. emission nebulab. reflection nebulac. molecular clouds5) If a protostar doesn’t have enough mass then nuclear fusion will never ignite nuclear fusion in the core. The Protostar then becomes a ______________,a. main sequence starb. white dwarfc. brown dwarfd. red giant6) Star formation takes longer for more massive starsa. trueb. false7) What is the single most important property of a star that will determine its evolution?a. temperatureb. compositionc. massd. radius8) A high mass protostar on the Hyashi track moves along a horizontal path on the HR diagram towards the left, this protostar must be (check all that apply)a. increasing in temperatureb. decreasing in temperaturec. Increasing in radius (expanding)d. decreasing in radius (contracting)e. increasing Luminosityf. decreasing Luminosity9) Protostars for low mass stars move on their Hyashi Track in a nearly vertical direction downwards on the HR diagram. This means that the star is (check all that apply)a. increasing in temperatureb. decreasing in temperaturec. increasing size (expanding)d. decreasing size (contracting)e. increasing in Luminosityf. decreasing in Luminosity10) There are 6 main sequence stars listed below, along with their mass (in solar Masses Ms) and luminosity in solar luminosities (Ls). Place the stars in order based on their the time it takes on their Hyashi tracks (how long it took to form from a protostar into a main sequence star ) from shortest lifetime (1) to longest lifetime (6)the Sun: mass 1Ms, luminosity 1 Ls [ Choose ] 1 6 2 3 5 4 Capella Aa: mass 3Ms, luminosity 76 Ls [ Choose ] 1 6 2 3 5 4 Rigel: mass 24Ms, luminosity 85000 Ls [ Choose ] 1 6 2 3 5 4 Sirius: mass 2Ms, luminosity 25 Ls [ Choose ] 1 6 2 3 5 4 Canopus:mass 8.5Ms, luminosity 13600 Ls [ Choose ] 1 6 2 3 5 4 Achernar: mass 7Ms, luminosity 3150 Ls [ Choose ] 1 6 2 3 5 4 11) there are 6 main sequence stars listed below, along with their mass (in solar Masses Ms) and luminosity in solar luminosities (Ls). Place the stars in order based on their main-sequence lifetimesfrom shortest lifetime (1) to longest lifetime (6)the Sun: mass 1Ms, luminosity 1 Ls [ Choose ] 3 4 2 5 1 6 Capella Aa: mass 3Ms, luminosity 76 Ls [ Choose ] 3 4 2 5 1 6 Rigel: mass 24Ms, luminosity 85000 Ls [ Choose ] 3 4 2 5 1 6 Sirius: mass 2Ms, luminosity 25 Ls [ Choose ] 3 4 2 5 1 6 Canopus: mass 8.5Ms, luminosity 13600 Ls [ Choose ] 3 4 2 5 1 6 Achernar: mass 7Ms, luminosity 3150 Ls [ Choose ] 3 4 2 5 1 6
Overview:Instructions: Telescopes are one of the most important tools that astronomers use. The Hubble Space Telescope is the most well
Astronomy Assignment Writing ServiceOverview:Instructions: Telescopes are one of the most important tools that astronomers use. The Hubble Space Telescope is the most well known of NASA’s space telescopes but it is actually only one of many space telescopes within NASA’s Telescope Fleet viewing the sky in multiple wavelengths of light. The Spitzer Space Telescope, an infrared telescope, has been one of astronomers’ best tools for learning about star birth in particular.Find a scientific article that tells us about one of the latest star formation discoveries and try to find out which telescope brought us the information. (put the name of your discovery in the subject line, e.g. the stellar nurseries’ name, or its location, key words to search on would include: star birth, stellar nurseries, star formation, etc.):***You may repeat a stellar nursery as long as your finding about it is substantially different from someone else’s. (Make sure to include this information in your Subject line.)Tell us also what part of the electromagnetic spectrum (e.g. optical, radio, x-ray, ultraviolet, etc.), was used in your research.Explain why your finding is useful to understanding the process of star birth,Supply your reference.

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