视星等 meaning in Chinese
[天文学] apparent magnitude
Examples
- Thus , the apparent magnitude is not an intrinsic property of the star
因此，视星等并不足以显示出恒星的内在特质。 - For example , the apparent magnitude of our sun is - 26 . 8 , but its absolute magnitude is just 4 . 8 . the absolute magnitude describes the
例如太阳的视星等为- 26 . 9等，但它的绝对星等只有4 . 8等。 - Jupiter is the second brightest planet after venus . the visual magnitude of jupiter is around - 2 . 5 a few weeks before and after the opposition
木星是除金星外最光亮的行星，木星冲前后几星期，其视星等约为- 2 - The longer the period , the brighter the star is . thus , by measuring the period of a cepheid variable , we know its absolute magnitude , hence , we can tell how far it is away by comparing with its apparent magnitude
所以，只要知道某一造父变星的周期，我们便可得知它的绝对星等，只要和它的视星等作比较，便可以求得它和我们的距离。