NirViaje
commented
5 years ago Ad Astra, Upper in the sky
- solar system
- the earth, the Jupiter, the Mars
- Saturn and rings, moons, asteroid, the system
- the sun, and beyond
- Hertzsprung–Russell diagram
- Main sequence
- Giant and dwarf
- absolute magnitude, Variable star
- https://en.wikipedia.org/wiki/Variable_star
- supernova, nuclear reaction inside
- neutron star, black hole
- Schwarzschild radius, Roche limit
- tide
- accretion disc and fluid dynamics
- Protoplanetary Disc
- black hole accretion
- galaxy
- other gravity system, double star, star cluster
- 类星体，活动星系核，暗能量
the earth, the Jupiter, and solar system
Across the galaxies and beyond
Messier objects, and NGC (New General Catalogue)
observation
the telescope system
- telescope
- Newtonian
- Galileo
- Schmidt–Cassegrain telescope
- etc
- https://en.wikipedia.org/wiki/Equatorial_mount
- Tripod
position/tracing technique, north pole, equatorial axis
objects
- ecliptic plane黄道白道赤道
- Constellation，黄道十二宫，大三角，天顶附近
- 星等，亮星
- 行星
- 梅西耶与NGC天体
neoshiningway
1937年7月7日发生芦沟桥事变，中日之间开战，杨惠敏加入上海童子军战地服务团。
1937年8月13日爆发淞沪保卫战，10月26日上海虹口四行仓库保卫战，10月28日夜间，杨惠敏将一面12尺长的中华民国国旗裹在身上所穿着的童军服底下，冒着战火危险自公共租界出发成功泳渡苏州河，并获得谢晋元的接见将国旗送至四行仓库（另有一说表示杨惠敏是循陆路靠近仓库[1]）。
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some code
71 oscillator.frequency.value = 440 * Math.pow(2, Math.floor(CurX/90) / 12);