Why are there few visual binaries with orbital periods of a few years or less?
Q: If the celestial sphere were to be considered a hypothesis, would it be correct?
A: Celestial sphere is a sphere of extremely large radius concentric with earth. It gives the…
Q: In a binary star system, the average separation between the stars is 4.0 AU, and their orbital…
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Q: What is an emission nebula?
A: The space between stars and galaxies is filled with clouds of gas and dust. These clouds of gas and…
Q: A star is observed to cross the meridian at an elevation of 67°, as seen from an observatory at a…
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Q: Why are there few spectroscopic binaries in which the stars are separated by more than 10 AU?
A: A binary star system is formed when two stars come close enough that they form an orbit around the…
Q: g baseline
A: (a) Triangulation allows to the measure distance of inaccessible objects . Astronomers use the…
Q: How much more luminous is the Sun viewed from Earth than from Pluto, 40.0 AU away? from Earth Lsun…
A: Luminosity follows inverse square relationship with the distance Thus, Lsun from Earth/ Lsun from…
Q: Why are Earth-based parallax measurements limited to the nearest stars?
A: Parallax is one of the methods used by astronomers to estimate the distance to stars and other…
Q: What kind of celestial object is Neowise C/2020 F3 and what makes it special?
A: Comets are rocky objects made of ice rock and dust. They orbit sun and when they get closer to sun…
Q: Orion nebula is located at 450 pc. Calculate the parallax angle.
A: Parallax is a method used to calculate the distance to astronomical objects like stars. Parallax is…
Q: When we look at a particular star, we are seeing it as it was 371 years ago. How far away from us…
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Q: Why can’t astronomers use parallax to measure the distance to stars that are extremely far away?
A: Because it is difficult to measure from earth reason is effects of earth atmospheric. Parallel angle…
Q: The velocities of the two stars are 28km/s and 13km/s, and their periods are both 16 years. Find the…
A: Formula Let period of a star is T, velocity is v, orbital radius is r and , mass is M, Now the…
Q: If a pulsar’s period is 0.05 seconds, how many times does it spin in one day?
A: Given data, Time period of the pulsar = 0.05 seconds
Q: Considering that Earth experiences an average intensity of sunlight of 1330 W/m? and is at a…
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Q: What are the names of the following three well-known constellations? (5) (6) (7).
A: please see the next step for solution
Q: O O O 1. Brightness 2. O 3. 4. 1 2 3 The position of the star and the planet on the left correspond…
A: A light curve illustrates the variation in a star's brightness caused by the passage of an exoplanet…
Q: The total intensity of light measured on earth, from an ecliptic binary, is plotted in the figure as…
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Q: Listed below are several fictional stars with their luminosities and distances from Earth given.…
A: Given information: The relative luminosity and distance of the stars from the Earth: Q-bert: L=400…
Q: If a star has a parallax of 0.016 arc second how far is it?
A: Parallax is the shift in the apparent position of stars when observed from different positions. This…
Q: If a star 10 parsecs away from us was moved and appeared to be 4 times brighter after movement, how…
A: Given, d=10 parsecs
Q: If star A has an observed flux that is 1 million times larger than star B, what is the magnitude…
A: Let the flux observed from the star A is BA and the star B is BB. Then Relative brightness can be…
Q: Which point in the stars orbit corresponds to the point marked in the radial velocity curve?
A: Required : The correct option.
Q: What is the dependence of the intensities of stars on parallax? Hint: consider the inverse-square…
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Q: What is an eclipsing binary?
A: Eclipsing binary is a variable star. It comes under binary star system.
Q: What is the total mass of a visual binary system if the average separation of the stars is 8 AU and…
A: A binary system is formed when two astronomical objects come close enough to start orbiting each…
Q: Why do distant stars look redder than their spectral types suggest?
A: The pace is mostly empty but there are areas of large density of the interstellar medium. It…
Q: between january and july , Star appears to move 5 degrees while star b appers to move 7 degress…
A: From January to July, in the span of 6 months, the 2 stars - A & B, are observed. Star A…
Q: What is the orbital period of Proxima Centauri and alpha Centauri about each other if the alpha…
A: Kepler's law is used to describe planetary motion. Kepler's third law describes the…
Q: What is a standard candle in the astronomical sense? How do Cepheid variables fit into this and what…
A: For distances which are too large to measure using parallax, astronomers use 'standard candles'.…
Q: You measure a star to have a parallax angle of 0.04 arc-seconds. What fraction of a degree is this?
A: Given 0.04 arc second=....°
Q: Stars A and B both have the same spectral class. Star A is 7 times farther away than star B. The…
A: Consider the brightness of the stars A and B be FA and FB, respectively, these luminosities be LA…
Q: How many kilometers are there in 5 parsecs?
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Q: What is the apparent magnitude of the sun as seen from Saturn about 10 AU away? Appear to magnitude…
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Q: Calculate by how many times Rigel is brighter than the Sun, if its parallax is 0.0069 arcsec, and…
A: If the apparent magnitude= 0.34 Then the formula for brightness= ∆I ΔI=1000.34/5ΔI=1000.345 =…
Q: How do you calculate the mass of a star?
A: To calculate mass of a single star is a difficult process however to calculate the mass of binary…
Q: You measure a star to have a parallax angle of 0.12 arc-seconds What is the distance to this star in…
A: Write the given values of the problem- Parallax angle=0.12 arc-second
Q: The H-R diagram is the most important graph in astronomy. One of the reasons that this graph is so…
A: The H-R diagram is an important tool to study about stars and related information which we could…
Q: What does a quarter wavelength look like , like theta/4
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Q: what does a clear area around a disc really tell us exactly?
A: A clear area around a disc, also known as a halo or zone of inhibition, is typically observed in…
Q: There are fewer eclipsing binaries than spectroscopic binaries. Explain why.
A: Binary systems are those in which two stars are gravitationally bound to each other and form orbit…
Q: The distance to a binary is 8x107 m and its apparent magnitude is +2. What is its absolute…
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