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...
Within a logarithmic scale, zero emerges as the absolute lowest conceivable value. In the realm of logarithms, this equates to an outcome of one, as any numerical entity raised to the power of zero invariably results in one. Grasping this fundamental facet of logarithmic scales is important whe...
Why does my keyboard have a scroll lock key if it's not used anymore? Although its original purpose is no longer relevant for most users, some programs still use the scroll lock key for other purposes. For example, Microsoft Excel uses it to change the behavior of certain commands like Ct...
modern operating systems have power management features that allow them to adjust system settings to conserve energy when not in use. this includes reducing screen brightness, turning off unused peripherals, and putting the system into sleep or hibernation mode. what is an real-time operating system...
There are two parts of the HDR system: the TV and the source. The first part, the TV, is actually the easier part. To be HDR-compatible, the TV should be able to produce more light than a normal TV in certain areas of the image. This is basically just likelocal dimming, but to ...
If Megastar has an absolute magnitude of -4, what is the apparent magnitude?Question:If Megastar has an absolute magnitude of -4, what is the apparent magnitude?Magnitudes of Stellar Brightness:Stars in the sky are classified according to various criteria: for example, their locatio...
notation, i.e.,\({[X]}=\log {X_{\mathrm{star}}} -\log {X_\odot }\)for any abundance quantity X, and\(\log {\epsilon (X)} = \log {N_{{X}}/N_{\mathrm{H}}} + 12.0\)for absolute number density abundances. For helium, we use Y, that is the fraction of He in ...
They follow particular patterns, with high points called "crests" and low points called "troughs." The time it takes for part of a wave to pass, measured from one crest to the next, is called the period.Answer and Explanation: Cepheid variables are a type of star that pulsate in a ...
Asteroids are also classified by their size and their location in relation to Earth.According to the Centre for Near Earth Object Studies (CNEOS) asteroids estimate the size of asteroids using their brightness or "absolutemagnitude" and how well they reflect sunlight back into space. ...
A working definition for dwarf galaxies was proposed in 1994 based on the brightness of the object in question as well as it's size. For brightness, the cutoff was taken to be an absolute magnitude (MB) of -16. The size would need to be "more extended than a globular cluster." ...