Challenges for those trying to find extrosolar planets include A. They are indistinguishable from stars B....
Challenges for those trying to find extrosolar planets include
| A. |
They are indistinguishable from stars |
|
| B. |
Planets are rare in the Milky Way |
|
| C. |
We have no means of detecting those that are there |
|
| D. |
Planets don |
Homework Answers
The challenges of observing extrasolar planets stem from three basic facts:
- Planets don't produce any light of their own, except when young.
- They are an enormous distance from us.
- They are lost in the blinding glare of their parent stars.
Challenges for those trying to find extrosolar planets include
| A. |
They are indistinguishable from stars |
Add Answer to:
Challenges for those trying to find extrosolar planets
include
A.
They are indistinguishable from stars
B....
36. The Sun is primarily made of ___ hydrogen B) helium C) hydrogen and helium D)...
36. The Sun is primarily made of ___ hydrogen B) helium C) hydrogen and helium D) nitrogen 37. Blue is associated with_ wavelengths. A) long B) medium C) short D) red 38. Our Sun is . Aaverage in size B) larger than most stars C) smaller than most stars D) hotter than most stars 39. A_ is formed in a Supernova A) black dwarf B) white dwarf C) green giant D) black hole or neutron star 40. The center of...
Furthermore, if we assume that the luminosity of a planet comes entirely from reflected starlight, then...
Furthermore, if we assume that the luminosity of a planet comes entirely from reflected starlight, then we can solve for the planet's luminosity as II. Direct Imaging Direct imaging is a technique for detecting extrasolar planets by observing them directly with telescopes. This technique is difficult to employ in practice because planets emit very little light compared to the very bright stars they orbit. In other words, there is a stark contrast ratio between stars and planets. The contrast ratio...
6. Suppose that a particular chemical substance A is "pure" (contains no "impurities"), and that it...
6. Suppose that a particular chemical substance A is "pure" (contains no "impurities"), and that it can be chemically decomposed into two other pure materials B and C. What conclusion can be draw from this? (a) B and C must be elements. (b) A must be an element. (c) B and C must be chemical compounds (d) A must be a chemical compound (e) nonsense -- it is impossible to decompose a pure substance into two other materials 7. A...
Multiple Choice Identify the choice that best completes the statement or a wer the question 1....
Multiple Choice Identify the choice that best completes the statement or a wer the question 1. One of the nearest stars is Alpha Centauri, whose distance is 4.4 light-years. The time it takes light to travel from Alpha Centauri to us is a 1.25 seconds b. 8.3 minutes c. 4.4 years. d. 600 years. 2. Which of the following is false? a The Local Group is a member of the Laniakea Supercluster, which contains thousands of galaxies. b. The Local...
Question 1) When does a protostar become a true star? Select one: a. when the star...
Question 1) When does a protostar become a true star? Select one: a. when the star is 1 million years old b. when the central temperature reaches 1 million Kelvin c. when nuclear fusion begins in the core d. when the thermal energy becomes trapped in the center Question 2: On average, what is the greatest mass a newborn star can have? Select one: a. 10 solar masses b. 50 solar masses c. 150 solar masses d. 300 solar masses...
Use Minitab to compute each of the following. Be sure to INCLUDE the commands from the...
Use Minitab to compute each of the following. Be sure to INCLUDE the commands from the Session Window so that I can determine “how” you obtained your answers. I will NOT grant credit for problems that do not include the commands from the session window! 1. In 2009 it was reported that 78% of all Americans had a computer in their home. Suppose we take a random sample of 100 American homes and let X be the number which own...
8. Consider how the heavy elements that make up planets like the earth are formed. Which...
8. Consider how the heavy elements that make up planets like the earth are formed. Which of the following is most likely to be true about the origin of Earth? Earth arose around a very ancient star (our sun) that had had plenty of time to synthesize heavy elements. Earth arose in a region of our galaxy where few earlier stars formed so that the hydrogen fuel for our sun was abundant. Earth arose in a region that was very...
________ include(s) all changes in equity during a period except those resulting from transactions with owners....
________ include(s) all changes in equity during a period except those resulting from transactions with owners. A. Periodminus−of−time elements B. Revenues C. Comprehensive income D. Performance
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you pro...
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you provide the mechanical means of rotating the rotor by turning the crank. Plug the wire with dual alligator clips into the end of the electric generator, and attach these clips to a light-emitting diode (LED): hand-operated electric generator LED box Electric currents created by the magnetic forces present in a...
PLEASE USE MATLAB this problem you are trying to find an approximation to the periodic function /(t) esint-1) over one period, o <t < 2π. In t-linspace(0,2*pi,200)' and let b be a column ve...
PLEASE USE MATLAB
this problem you are trying to find an approximation to the periodic function /(t) esint-1) over one period, o <t < 2π. In t-linspace(0,2*pi,200)' and let b be a column vector of evaluations of f at those points. (a) Find the coefficients of the least squares fit In MATLAB, let (b) Find the coefficients of the least squares fit f(t)ndy+d2 cos(t)+ d, sin(t)+d, cos(2t)+dy sin(2t). (c) Plot the original function f(t)and the two approximations from (a) and...
36. The Sun is primarily made of ___ hydrogen B) helium C) hydrogen and helium D) nitrogen 37. Blue is associated with_ wavelengths. A) long B) medium C) short D) red 38. Our Sun is . Aaverage in size B) larger than most stars C) smaller than most stars D) hotter than most stars 39. A_ is formed in a Supernova A) black dwarf B) white dwarf C) green giant D) black hole or neutron star 40. The center of...
Furthermore, if we assume that the luminosity of a planet comes entirely from reflected starlight, then we can solve for the planet's luminosity as II. Direct Imaging Direct imaging is a technique for detecting extrasolar planets by observing them directly with telescopes. This technique is difficult to employ in practice because planets emit very little light compared to the very bright stars they orbit. In other words, there is a stark contrast ratio between stars and planets. The contrast ratio...
6. Suppose that a particular chemical substance A is "pure" (contains no "impurities"), and that it can be chemically decomposed into two other pure materials B and C. What conclusion can be draw from this? (a) B and C must be elements. (b) A must be an element. (c) B and C must be chemical compounds (d) A must be a chemical compound (e) nonsense -- it is impossible to decompose a pure substance into two other materials 7. A...
Multiple Choice Identify the choice that best completes the statement or a wer the question 1. One of the nearest stars is Alpha Centauri, whose distance is 4.4 light-years. The time it takes light to travel from Alpha Centauri to us is a 1.25 seconds b. 8.3 minutes c. 4.4 years. d. 600 years. 2. Which of the following is false? a The Local Group is a member of the Laniakea Supercluster, which contains thousands of galaxies. b. The Local...
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you provide the mechanical means of rotating the rotor by turning the crank. Plug the wire with dual alligator clips into the end of the electric generator, and attach these clips to a light-emitting diode (LED): hand-operated electric generator LED box Electric currents created by the magnetic forces present in a...
PLEASE USE MATLAB
this problem you are trying to find an approximation to the periodic function /(t) esint-1) over one period, o <t < 2π. In t-linspace(0,2*pi,200)' and let b be a column vector of evaluations of f at those points. (a) Find the coefficients of the least squares fit In MATLAB, let (b) Find the coefficients of the least squares fit f(t)ndy+d2 cos(t)+ d, sin(t)+d, cos(2t)+dy sin(2t). (c) Plot the original function f(t)and the two approximations from (a) and...
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