In no more than three sentences I must state the "Hubble relationship" in words AND quantify numerically what it says about the "speed of recession" of distant galaxies (i am to include a definition of the "unit one parsec" in this 3-sentence answer) - CAN SOMEONE HELP ME PLEASE!
The Hubble relationship states that the speed at which a galaxy is moving away from us is directly proportional to its distance from us. Mathematically, this can be expressed as v = H0 * d, where v is the galaxy's recession velocity, H0 is the Hubble constant, and d is the galaxy's distance. One parsec is equivalent to approximately 3.09 × 10^13 kilometers. Therefore, the Hubble relationship tells us that for every 3.09 × 10^13 kilometers of distance, the speed of recession of a galaxy increases by the value of the Hubble constant.
