A. Its distance from other stars B. Its age C. Its mass D. The amount of dust around it 相关知识点: 试题来源: 解析 C。解析:The size and brightness of a main-sequence star depend on its mass.表明主序星的大小和亮度取决于它的质量。反馈...
1. absolute brightness - the brightness a star would have if it were 10 parsecs from Earth. Looking for patterns If we plot a graph of luminosity against temperature for lots of stars we get a graph like this… HR DIAGRAM AND STAR SIZES!. So, we know how to measure the following prope...
Algol normally shines at magnitude 2.1, similar to the nearby star Almach (aka Gamma Andromedae). But while fully dimmed, Algol's brightness of magnitude 3.4 is almost identical to Rho Persei (or Gorgonea Tertia or ρ Per), the star sitting just two finger widths to Algol's lower right...
Alpha Centauri A is the brightest star that resembles the Sun in multiple aspects, including diameter, absolute magnitude, and spectral type. Meanwhile, the second brightest star, Alpha Centauri B, is relatively redder than Alpha Centauri A. The third and the last star, Proxima, falls under the...
000 years, since it is bright enough to be seen by the naked eye. You don’t need a telescope or even binoculars. In Roman mythology, it is the god of war, borrowed from the Greek god Ares. And ancientMesopotamian textsrefer to Mars as “the “star of judgment for...
What is a star whose brightness changes called? What is the angular size of the Sun? What type of star is the Sun? How far is 100 astronomical units? What is the size of the sun? What size is the sun compared to other stars?
A supermoon occurs when thefull mooncoincides with the moon being at the point in its orbit within 90% of its closest approach to Earth, called perigee. This makes the moon appear slightly brighter and closer than usual, though the difference is difficult to notice with the naked eye. ...
Implementations vary, but a combination of LTPO and software changes allows for dynamic refresh rates actively ranging from 120Hz down to 1Hz, although in reality, lowering refresh rates to 60, 24, and 10Hz is more common. The idea is simple in principle: reducing the number of display updat...
What is a globular star cluster? Which would be more luminous: a star with radius 12 times the Sun with temperature 0.3 times of the Sun or the Sun? What is a star whose brightness changes called? What is stellar astronomy? What kind of spectra does a Hubble Telescope have?
What is a globular cluster? Globular clusters are some of the densest regions of stars in the sky. Living on the outskirts of their home galaxies, globular clusters can be home to tens of millions of stars, some of which are the oldest in their home galaxies. Is a globular cluster bigg...