The closest star to our Sun (Proxima Centauri is about 4.0 x 1016 m away. It...
The closest star to our solar system is Proxima Centauri, with a diameter of 2.0 x 10^8 m (about 1/3 that of the sun) and a distance of 9.5 x 10^15 m (4.2 light years). The world’s largest optical telescope is Gran Telescopio Canarios, with an objective mirror with a diameter of 10.4 m and focal length 16.5 m. The effective focal length of the imaging lens = 11.8 cm. What angle does Proxima Centauri subtend in the sky and...
Proxima Centauri, the closest star to us besides our own Sun, is 4.10 x 1013 km from Earth. From Zorg, a planet orbiting this star, Gregor places an order at Tony's Pizza in Hoboken, New Jersey, communicating by light signals. Tony's fastest delivery craft travels at 1.00 × 104c (The speed of light, designated by the universally recognized symbol c, has a value of 3.00 x 108 m/s). (a) How long does it take Gregor's order to reach Tony's Pizza?...
The nearest star to Earth besides the Sun is Proxima Centauri, which is a distance of approximately 4 light years away. A planet that may be able to sustain liquid water on its surface was discovered in 2016 orbiting Proxima Centauri. According to observers on Earth, a spaceship that travels at 0.9c should be able to reach the planet in 3.6 years. How long would the trip take according to astronauts on board the spaceship?
Proxima Centauri, the nearest start to the Sun, is about 4 light years from Earth, and Antares is about 520 light years from Earth. Antares is a very bright star easily seen with the naked eye but Proxima Centauri is so dim that a small telescope is needed to see it. What can you say about the relative luminosities of Antares and Proxima Centauri?
Alpha Centauri, the binary star closest to our solar system, is about 4.0 ly away. If a spaceship traveled this distance with a constant speed of 0.85c relative to Earth, how much time would elapse (a) on a clock on the spaceship? Ans in Years
Alpha Centauri is the closest star system and planetary system to our Solar System at 4.24 light-years from the Sun. A NASA spacecraft, Deep Space 1 (DS1), can travel in deep space at a top speed of 35,000 mph, how many years would it take DS1 to reach Alpha Centauri? Assuming light travels at a speed of 299,792,458 meter per second and 1 mile = 1609 meters.
Tau Ceti is a star that is located 11.753 ly away. There
is a planet orbiting this star with an orbital radius of 0.538 AU
(AU stands for astronimcal unit - the average distance between
Earth & the Sun). Fill in the table below by determining the
minimum diameter the objective of a telescope would need to be in
order to resolve the planet from the star at the stated
wavelengths. 1 ly = 9.461 × 1015 m & 1...
If an optical telescope focusing light of wavelength 558 nm had a perfectly ground mirror, what would have to be the minimum diameter of its mirror so that it could resolve a Jupiter-size planet (the diameter of Jupiter is 1.38×108 m) around our nearest star, Alpha Centauri, which is about 4.30 light years from earth? (1 light year = 9.46×1015 m ). D= ? meter
f) in vacuum, light travels at about 186,282 miles per second. One mile is about 161 kilometers (km). Astronomers prefer to use units of distance that are reasonable in describing how far objects are from Earth. For example, for distances in the solar system we use the astronomical unit (AU), which is equal to the average distance of Earth from the Sun; 1 AU is about 150 million km. For distances to stars and galaxies, astronomers use the light-year (1...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 10 light years and an orbital speed of about 210 km/s . A) Determine the mass of the massive object at the center of the Milky Way galaxy. Give your answer in kilograms. B) Give your answer in solar masses (one solar mass is the mass of the sun). C)...