The star Betelgeuse is about 197 pc away. How far is Betelgeuse in ly ? In meters? A. 642.2 ly= 2.08 x 10^18 meters B. 60.4 ly = 5.72 x 10^14 meters C. 642.2 ly = 6.08 x 10^15 meters D. 642.2 ly = 6.08 x 10^18 meters

Q: Of the following objects, the one that produces the least energy is a   a. supernova.   b. Type 1…

A: Answer:- Option (a) correct. Supernova.

Q: A (relatively) nearby K-type star known as Nu? Canis Majoris has an estimated orbital radius of…

A: Given Data: Orbital radius, r=2.3344×108 km=2.3344×1011 m Time period, T=736.9…

Q: black hole.

A: A quasar is an extremely bright Active Galactic Nucleus also known as AGN. The Quasars radiates a…

Q: GMm F r2 F,(r = R) The surface gravity g = of a body is. The acceleration due to gravity that an…

A:

Q: The traditional theory of the formation of our galaxy CANNOT explain   a. the existence of the disk…

A: a. The existence of the disk of the galaxy

Q: Suppose we find an Earth-like planet around one of our nearest stellar neighbors, Alpha Centauri…

A:

Q: The sun is about 8 kpc from the center of the galaxy. A kpc or kiloparsec is equal to   a. 10…

A: A kpc or kiloparsec is equal to the 1000 parcec Here,  In the option this value is not given

Q: The last nuclear reaction in the core of massive stars that uses energy rather than producing energy…

A: When the Helium in the core of the massive stars exhausts, the evolution of stars is different from…

Q: A star is observed to have a parallax of 0.05". If we were to send a radio signal towards this star…

A:

Q: Disk population stars have   I.   circular orbits in the plane of the galaxy   II.  randomly…

A:

Q: The Messier Catalog is a. a listing of all the stars within the Local Bubble b. a list of all the…

A: The Messier catalog is a list of 110 commonly found objects in the night sky that can be easily…

Q: The spectra of the cores of Seyfert galaxies contain emission lines of highly ionized atoms that are…

A: Given, The spectra of emission of the cores of Seyfert galaxies

Q: The traditional theory states that our galaxy formed   a. as a large spherical cloud of gas that…

A: According to traditional theory the galaxy is formed by the combination of gas and dust particles.…

Q: What type of star has the longest life span? a. O b. K c. B d. A e. M

A: What type of star has the longest life span?

Q: Giant and supergiant stars are 10 to 1,000 times larger in diameter than the sun and   a. are half…

A: Given statement :  "Giant and supergiant stars are 10 to 1,000 times larger in diameter than the…

Q: Our galaxy is suspected to be surrounded by a galactic corona because the disk of the galaxy   a.…

A: Introduction: A galactic corona is used to describe a hot, ionized, gaseous component in the…

Q: WHERE 9*10^9 came from

A:

Q: The gas and dust cocoon surrounding young stars   a. is blown away when the young stellar surface…

A: In the initial stage of star formation i.e protostar phase the young star is surrounded by dust and…

Q: Which star in the table below has the greatest diameter?     Star Name d (parsecs) Parallax…

A: d. 58 Ori

Q: Astronomers think of pulsars not as pulsing objects, but rather like a(n)   a. Cepheid variable.…

A: A Cepheid variable is a class of stars, that varies in its apparent magnitude values over a period…

Q: The approximate diameter of the disk of the Milky Way is   a. 8.0 A.U.   b. 8.0 light-years.   c.…

A: To determine diameter of the disk of the milky way

Q: Stars that contract the quickest to land on the zero-age main sequence on the H–R diagram   a. are…

A: Zero Age Main Sequence (ZAMS) is the time when a star first joins the main sequence on the…

Q: 2. 60 million years ago, an asteroid hit the Earth and killed every T-Rex on Earth. That same day, a…

A: To estimate the mass of the star that left the main sequence 45 years ago, let's break down the…

Q: 7. What is the technical name for a star family that formed at the same time from a single cloud of…

A: A star cluster is a group of stars that are born at the same time from a single cloud of gas. They…

Q: ow is Doppler shift used in detecting extra solar planets? * A. Scientists observe those stars…

A: In our solar system, all bodies orbit a common center of mass, including the Sun, but the Sun is so…

Q: Of the following types of stars, the one that has never been and can never be a giant star is a   a.…

A: a. Red dwarf stars

Q: Our solar system orbits the center of the Milky Way galaxy in about 200 million years. If there were…

A: Like planets move in a circular motion around the sun, the solar system moves in a circular motion…

Q: What triggers the nucleus of a galaxy into activity?   a. a nova explosion   b. a type I supernova…

A: (e) none of above

Q: The large black hole at the center of our galaxy is estimated to be a. 3.7 solar masses. b.…

A: Given : Asked to choose the correct option for the mass of the large black hole present at the…

Q: A star with an original mass of 9MSun undergoes an active period where it experiences mass loss via…

A: Given data: Mass of the star, Mstar=9Msun Time, t=1.1 million years = 1.1×106 years New mass,…

Q: Objects in binary systems consist of a neutron star accumulating material from another star on its…

A: Answer:b) X-ray bursters.  X-ray bursters are basically are one class of X-ray binary stars…

Q: 1.004 1.002 1.000- 0.998 0.996 0.994 0.992 0.990 10 20 30 40 50 t-2458543 [BJD] From the data,…

A: A: Orbital period of the planet can be estimated from the plot. B: The orbital distance of the…

Q: If the Hubble constant equals 70 km/s/Mpc, the age of the universe roughly equals   a. 6 billion…

A: Given:Hubble's constant H=70km/s/MpcTo find:Age of universe=??

Q: 1.  A planetary nebula has an angular diameter of 76 arc seconds and a distance of 5100 ly. What is…

A: 1.Small angle Formula:D=αd2.06×105where, D is the linear diameterα is the angular diameter=76 arc…

Q: V. A simple experimental set up is shown in the following figure. Masses of blocks MA, and MB are…

A: Given data: MA=50 kg. MB=20 kg. Draw a free-body diagram of the given system. Free body equation…

Q: Given that a pair of stars are found to be orbiting each other with a period of 11.86 [yrs] and a…

A:

Q: Exercise: One parsec is a unit of distance equal to roughly 3.25 light-years. The prefix Mega means…

A: For this problem, it is required to convert the distance 24 Mpc into kilometers. It is given that, 1…

Q: Star clusters are important to our study of stars because   a. all stars formed in star clusters.…

A: A star cluster is a group of stars that share a common origin and are gravitationally bound for some…

Q: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…

A: Population 1 stars are the newer and younger stars.

Q: 1. Consider our Sun - it is in orbit around the center of our Milky Way Galaxy. The velocity of the…

A: The Sun orbits around the center of the milky way with an orbital velocity of 250 km/s.  Considering…

Q: Absorption lines produced when starlight travels through the interstellar medium indicate that some…

A: The answer for the following question is

Q: 2. Over several months an astronomer observes an exoplanet orbiting a distant star at a distance of…

A: We have, T=2πRvv=GMstarR T=3.875 years =3.875×365×24×60×60 seconds =122202000 secondsR=5.934 AU…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.