Which of the following scientists have contributions relating to intelligent alien life-forms? Cannon and Hubble Drake and Sagan Hawking and Copernicus Kaku and Kepler

Q: You are on an interstellar mission from the Earth to the 8.7 light-years distant star Sirius. Your…

A: * The distance appears to you in spaceship will be

Q: Olbers's paradox is solved in part by the fact that the universe is neither infinitely large nor…

A: Olber's paradox is solved by fact that universe is expanding.

Q: why in the pythagorean theorem formula is it "a^2 - b^2" instead of "a^2 + b^2"

A:

Q: Enter the following expression in the answer box below: 2gλ3m−−−−√2gλ3m, where λλ is the lowercase…

A: The required expression to fill in the answer box is written below.

Q: Scientific models are often built in stages or layers, starting with a single idea. Which idea…

A: The Big Bang is a cosmological model of the observable universe that describes how the cosmos…

Q: The objects that are detected at the points where the gas of a radio jet hits the extragalactic…

A: The quasar are small and the powerful source if energy that is active core of very distant galaxies.

Q: Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light. (Hint: The…

A: The light-year is the unit of length, and it is used to represent the astronomical distance.

Q: Elon Musk landed on a planet made of antimatter, there would be an explosion and

A: When matter and antimatter come in contact anhilation takes place and both converted to energy By…

Q: The Andromeda Galaxy has a mass of around 4 x 10* 42 kg and is 2.4 x 10*22 m away. What is your…

A: Given data: Mass of galaxy (M) = 4×1042 kg Distance from centre of mass (r) = 2.4×1022 m

Q: A sphere of matter and a sphere of antimatter (both at rest) can annihilate releasing 0.6· 1030 MeV…

A: Let mass of each sphere be m the total energy  released when annihilated, E=0.6 x 1030 MeV = 0.6 x…

Q: Does Hubble’s Law have anything to say about the motion of stars relative to other stars in the same…

A: Hubble's law in cosmology is an observation which states that when seen from earth, galaxies are…

Q: If our universe is expanding, what are the implications for the separation between two stars within…

A: C. The distance between the two stars is unaffected

Q: (a) For the observers on the aircraft, how much time separates the novas? (b) Which one occurs…

A:

Q: In accordance with Einstein’s theory of relativity, calculate the mass of the matter needed to be…

A: We are given with energy ,E = 1.75 × 1015 watt hour

Q: Spectroscopy is used to help astronomers analyze and catalogue objects as they map the universe. One…

A: Spectroscopy is a branch of physical sciences which deals with study and observation of spectra…

Q: Explain the term Gravitational lensing?

A: Gravitational lensing is the term that is used to describe the bending and distortion in the path of…

Q: Why is it difficult to detect planets orbiting other star

A: Cosmology and astronomy deal with astronomical bodies such as planets, stars, galaxies, comets.…

Q: The Andromeda galaxy is about 2.5 million light-years or 2.4 x 1022 m from our Milky Way galaxy, and…

A:

Q: Why do bigger stars burn out quicker(have a shorter lifespan

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Q: (II) Use Table 1–3 to estimate the total number of protons or neutrons in (a) a bacterium, (b) a DNA…

A:

Q: Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,…

A: we see galaxies as they looked before years light takes to reach us from them. let say a galaxy is…

Q: Dark matter experiments are built underground to avoid detecting which type of particle? Group of…

A: In order to reduce the noise level signals caused by Cosmic Rays at Earth's surface, dark matter…

Q: How can we apply the principles of Galilei in our everyday life?

A: Galileo Galilei was a natural philosopher, astronomer, and mathematician. He made many contributions…

Q: Can we find a unified theory of physics?

A: Unified Field Theory:- A unified field theory (UFT) in physics is a sort of field theory that…

Q: The Search for Extraterrestrial Intelligence (SETI) makes use of a huge, multi-billion-dollar…

A: The network of radio telescopes around the world is a multi purpose project, not just solely for the…

Q: Put these in order from smallest to largest Universe Galaxy Solar system Distance between earth and…

A: Here we arrange these things on the bases of their size in increasing order.

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: Black hole candidates are conspicuous by their continuous or flickering emission of   a. infrared…

A: Introduction: A black hole is a region where gravity is so strongest that nothing can even particles…

Q: Astronomers frequently say that “there are more stars in the universe than there are grains of sand…

A:

Q: _______ is the hypothetical form of energy that produces a force that opposes gravity and is thought…

A:

Q: The Drake Equation is a tool for estimating ...    A)  the number of alien civilizations…

A: Drake equation is a speculative equation which gives an approximate number of extra-terrestrial…

Q: Radio telescopes are an essential tool for modern astrophysics. They played a crucial role in…

A:

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: what is James B. Pollack contributions to physics    and what is Steven chu contributions to…

A: This is a question regarding the contributions of two physicists. James B. Pollack (born July 9th,…

Q: Why Is It Not Easy To Quantize Gravity?

A: It is not easy to quantize gravity because constants involved in gravitational interaction such as…

Q: It is year 2080 and we have figure out a propulsion system that allows spaceships travel at…

A:

Q: Compare the values of the number of grains of sand in all earth’s beaches with the number of stars…

A:

Q: Which is a scientific hypothesis? Select one: a.atoms are the smallest matter particles b.the…

A: Meaning of hypothesis is presumption or supposition. A scientific hypothesis is that presumption or…

Q: From the lists below, choose the one that best ranks the following astronomical objects from closest…

A: The distance of the Jupiter from the Earth,

Q: The famous debate where one person argued that faint objects were part of our system and the other…

A: The famous debate also called as the Shapley-Curtis debate.  This debate was held on 26th April…

Q: Was the Big Bang an explosion? Explain your answer.

A: the Big Bang wasn't an explosion that destroyed things.

Q: billion .stars in the Milky Way 100 and 300 O 100 and 400 O 100 and 200 O 100 and 500 O No one of…

A:

Q: Astronomers are always seeking to build bigger, more powerful telescopes, which will allow them to…

A: Astronomers are always seeking to build bigger, more powerful telescopes, which will allow them to…

Q: The Planck time is the unique interval of time that can be built out of G, c, and h.  Some…

A: G = 6.7 x 10-11 kg-1 m3 s-2 c = 3 x 108 m s-1  h = 6.6 x 10-34 kg m2 s-1   We have to to find the…

Q: What is Heinrich Hertz discovery and experimentation? please answer it using diagram.

A:

Q: The distance unit best for interstellar distances is the light-year. ___   The distance unit best…

A: light year is distance travelled by light in 1 year and is used to measure interstellar distance. so…

Q: If Jim could drive a Jetson's flying car at a constant speed of 330 km/hr across oceans and space,…

A:

Q: Astronomers believe that the universe is expanding and that stellar objects are moving away from us…

A: (a) The relation between radial velocity and distance using Hubble's constant will be given by; V=HD

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.