假设你在chicago, google "chicago gps coordinates", you will get 41.8781° N, 87.6298° W. write down 41 假设你对mars感兴趣， google "mars angel of declination", you will get 6 degree formula = 6-41 = -35. 你抬头看正上空 (zenith， 0度), 然后向东南方向35 度角， 你就嫩看到mars. 大概10:30 cst. 假设你对北斗七星感兴趣， Merak‘s angle of declination is 56. 56-41 = 15. 因为是正， 向西北角15看。around 8:30 cst. you can see Venus around 4:30-5:30 am cst.
around 9:30 pm cst, you can see cassiopeia, cepheus, Pegasus， vega. almost on the top. and jupiter, saturn to the south. now is almost full moon.
假设你在chicago, google "chicago gps coordinates", you will get 41.8781° N, 87.6298° W. write down 41 假设你对mars感兴趣， google "mars angel of declination", you will get 6 degree formula = 6-41 = -35. 你抬头看正上空 (zenith， 0度), 然后向东南方向35 度角， 你就嫩看到mars. 大概10:30 cst. 假设你对北斗七星感兴趣， Merak‘s angle of declination is 56. 56-41 = 15. 因为是正， 向西北角15看。around 8:30 cst. you can see Venus around 4:30-5:30 am cst.
around 9:30 pm cst, you can see cassiopeia, cepheus, Pegasus， vega. almost on the top. and jupiter, saturn to the south. now is almost full moon.
In the Northern Hemisphere, the core is visible from March to October. But the best time for viewing it is from late April to late July, because the galactic center is visible for longer during the night. 到黑暗的地方抬头就看到了，很宽很大的一个带子，星空里没有别的东西长那样，不会看走眼的。 算zenith angle 和azimuthal angle还是算了，基本每天都不一样，除非特别亮的不然根本不靠谱啊。
In the Northern Hemisphere, the core is visible from March to October. But the best time for viewing it is from late April to late July, because the galactic center is visible for longer during the night. 到黑暗的地方抬头就看到了，很宽很大的一个带子，星空里没有别的东西长那样，不会看走眼的。 算zenith angle 和azimuthal angle还是算了，基本每天都不一样，除非特别亮的不然根本不靠谱啊。 iberianstar 发表于 2020-08-31 21:33
假设你在chicago, google "chicago gps coordinates", you will get 41.8781° N, 87.6298° W. write down 41 假设你对mars感兴趣， google "mars angel of declination", you will get 6 degree formula = 6-41 = -35. 你抬头看正上空 (zenith， 0度), 然后向东南方向35 度角， 你就嫩看到mars. 大概10:30 cst. 假设你对北斗七星感兴趣， Merak‘s angle of declination is 56. 56-41 = 15. 因为是正， 向西北角15看。around 8:30 cst. you can see Venus around 4:30-5:30 am cst.
around 9:30 pm cst, you can see cassiopeia, cepheus, Pegasus， vega. almost on the top. and jupiter, saturn to the south. now is almost full moon.
前面说了仰望星空朝哪个方向看星辰。 现在说什么时候去看。 google "Right Ascension mars", you get "1h 45m 34s", write down 1. This is as of 3/21 (Vernal Equinox). it means as of 3/21, mars set 1 hour behind (after) sun set. in other word, theoretically , since it''''s dark (sun has already set), you should be able to see mars -- but barely because mars will set within 1 hour, it should already near horizon so it''''s not practical to see it during March. this number will decrease by 2 every month: 3/21 1 4/21 -1 5/21 -3 6/21 -5 7/21 -7 8/21 -9, Mars set -9 hours behind sun set, or it set 9 hour ahead of sun set (so you never see Mars at early night), or it rise 9 hour before sun rise. Assume sun rise around 7 am, then 9 hour before sun rise is 10 pm. That''''s why you should be able to see Mars around 10 pm at night. we can do another example, famous Vega, Right Ascension=18h 36m 56s (as of 3/21), so at 8/21 it will be 8 (Vega will set 8 hour after sun set). it means it will stay in the sky most of evening. in addition, its angel of declination = 38° 47′ 1″, assume you are near Chicago (your latitude = 41), 38-41=-3 (degree from zenith). zenith (0 degree) is right above your head. so Vega is right above your head. Vega is also 2nd bright star in northern celstial hemisphere. that''''s why Vega is very noticeable (and famous) in the summer. it says astronomer study it extensively. Venus''''s RA is 7h 36m 43s, so on 8/21 it''''s -3, (it set -3 hours after sunset, set 3 hour before sun set, or rise 3 hour before sun rise). that''''s why you can see Venus in early dawn. 在中国古代称为太白、明星或大嚣。 早晨出现在东方称启明。 天已快亮， 其他星星都隐退， 它依然耀眼， 真的好白好亮。不过我觉得 晚上看火星 金灿灿 觉得火星更应该叫金星。
假设你在chicago, google "chicago gps coordinates", you will get 41.8781° N, 87.6298° W. write down 41 假设你对mars感兴趣， google "mars angel of declination", you will get 6 degree formula = 6-41 = -35. 你抬头看正上空 (zenith， 0度), 然后向东南方向35 度角， 你就嫩看到mars. 大概10:30 cst. 假设你对北斗七星感兴趣， Merak‘s angle of declination is 56. 56-41 = 15. 因为是正， 向西北角15看。around 8:30 cst. you can see Venus around 4:30-5:30 am cst.
around 9:30 pm cst, you can see cassiopeia, cepheus, Pegasus， vega. almost on the top. and jupiter, saturn to the south. now is almost full moon.
看银河需要光污染小的地方。你google附近适合stargazing的地方就可以了。
季节性的。北半球夏末不错。去Acadia看过，满天的星光，裸眼可见的银河在正中，很震撼
谢谢 好的
假设你对mars感兴趣， google "mars angel of declination", you will get 6 degree
formula = 6-41 = -35. 你抬头看正上空 (zenith， 0度), 然后向东南方向35 度角， 你就嫩看到mars. 大概10:30 cst.
假设你对北斗七星感兴趣， Merak‘s angle of declination is 56. 56-41 = 15. 因为是正， 向西北角15看。around 8:30 cst.
you can see Venus around 4:30-5:30 am cst.
around 9:30 pm cst, you can see cassiopeia, cepheus, Pegasus， vega. almost on the top. and jupiter, saturn to the south. now is almost full moon.
或者下个star chart，用月亮定位
进来学习知识
去Acadia的时候，居然忘记看这个了。是在山顶上看的吗？
找不到足够黑暗的地方啊，到处都是光。。
妈呀，华人上卧虎藏龙
刚从班芙回来，错过了🙁，用天文望远镜的话容易看见吗
google "Right Ascension mars", you get "1h 45m 34s", write down 1. This is as of 3/21 (Vernal Equinox). it means as of 3/21, mars set 1 hour behind (after) sun set. in other word, theoretically , since it''''s dark (sun has already set), you should be able to see mars -- but barely because mars will set within 1 hour, it should already near horizon so it''''s not practical to see it during March.
this number will decrease by 2 every month:
3/21 1 4/21 -1 5/21 -3 6/21 -5 7/21 -7 8/21 -9, Mars set -9 hours behind sun set, or it set 9 hour ahead of sun set (so you never see Mars at early night), or it rise 9 hour before sun rise. Assume sun rise around 7 am, then 9 hour before sun rise is 10 pm. That''''s why you should be able to see Mars around 10 pm at night.
we can do another example, famous Vega, Right Ascension=18h 36m 56s (as of 3/21), so at 8/21 it will be 8 (Vega will set 8 hour after sun set). it means it will stay in the sky most of evening. in addition, its angel of declination = 38° 47′ 1″, assume you are near Chicago (your latitude = 41), 38-41=-3 (degree from zenith). zenith (0 degree) is right above your head. so Vega is right above your head. Vega is also 2nd bright star in northern celstial hemisphere. that''''s why Vega is very noticeable (and famous) in the summer. it says astronomer study it extensively.
Venus''''s RA is 7h 36m 43s, so on 8/21 it''''s -3, (it set -3 hours after sunset, set 3 hour before sun set, or rise 3 hour before sun rise). that''''s why you can see Venus in early dawn. 在中国古代称为太白、明星或大嚣。 早晨出现在东方称启明。 天已快亮， 其他星星都隐退， 它依然耀眼， 真的好白好亮。不过我觉得 晚上看火星 金灿灿 觉得火星更应该叫金星。
脑补了一下美丽的画面。西部这些地方应该去一次。后悔念书的时候没去，现在想去好像总找不到合适时机。
太年轻了，我们小时候在国内都看得到，还是城市里，银河，牛郎织女，都看得到。
不懂天文，但是看到两次震撼的星空。 一次是在big island的Mauna key 一次是在南美安第斯山海拔近3000米的glacier下面露营，夜里出帐篷上厕所，看到了最美的星空和crux
天文望远镜是看单颗星星的，看不了银河。银河裸眼看就行，就是光污染必须少少少。
我个人觉得，如果不是要看土星环、木星红斑什么的，就是想认认星座的话，可以入手一个双筒望远镜。
发光的银行，好好笑呀
现在农村都看不到了
抬头看就是闪亮的银河，离开城市到光污染少的地方都有。没有月光的天。
山顶不行。周围harbor的光污染太强，看不见银河。去闭静的海滩。周围的树木高，挡住周围小镇的光，海滩一片漆黑才行
marrrk