Astronomy | Astrophysics Answers

2.1 Talk to at least three people who speak different languages and find out the following:

2.1.1What is the equivalent word for Universe in their mother tongue? Write the word and specify the language.

 2.1.2 Find out what they learned from their parents/grandparents about the stars and other heavenly bodies.

You have used Cepheid variable to measure the distance to a nearby spiral galaxy. The spiral galaxy is 5.0 Mpc (megaparsecs) away. Three years ago, a Type 1a supernova was observed in this galaxy, and had a peak flux of 6.2 × 10^-14W m^-2.

You have just discovered a new Type 1a supernova in a very distant galaxy. This new supernova stayed bright for the same time as the one in the nearby spiral galaxy. The flux of the new supernova was 1.3 × 10^-18W m^-2.

What is the distance to the new supernova (in Mpc)?:

What is the instantaneous velocity (in m/s) of a coconut falling vertically from a coconut tree after 2 2,0s?

The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We no nothing about what stage of stellar evolution either of these stars are in. Which of the following are true?

1.Star A has a higher luminosity than Star B.

2.Star B has a higher luminosity than Star A.

3.Star A is cooler than Star B.

4.Not enough information to comment on their luminosities.

5.Star B has a higher luminosity AND is hotter than Star A.

6.Star A is cooler, BUT there is not enough information to comment on their luminosities.

The Event Horizon Telescope is attempting to image the supermassive black hole at the center of the Milky Way using Very Long Baseline Interferometry. How big of an object at the center of the Milky Way can the Event Horizon Telescope resolve? (Please express your answer in units of solar radii.)

The red supergiant Betelgeuse has a surface temperature of 3600 K.

a) Using the fact that the Sun's surface temperature is about 5800 K and that its continuous spectrum peaks at a wavelength of 500 nm, find the peak wavelength of Betelgeuse's continuous spectrum. (Please enter your answer in units of nanometers)

b) Betelgeuse has a luminosity that is 120,000 times that of the Sun. Find Betelgeuse's radius. (Please enter your answer in units of kilometers)