richardbell.net 的前十大競爭對手

amsky.com

爱司凯是我们的名字我们用首字的“爱”和英文名称“amsky”里面的“sky”相融，寓意爱司凯人的梦想在星辰大海。我们只专注全球高门槛的技术，挑战国际巨头的独霸棋局。水深流静，十年磨一剑的执着，在自研喷头，激光技术和精密运动控制都取得了前所未有的突破。内心那份对前沿技术无尽的好奇，和为客户带来真正价值的渴望驱动我们一路前行每一步都走的踏实坚定。

astroleague.org

Membership Through A Member Society Any club, society, or organization with a bonafide interest in astronomy may become a member of the Astronomical League (hereinafter referred to the League), no fewer of whom shall belong to the League than constitute the current membership list of said organizations, on the basis of the League's "membership criteria",

lochnessproductions.com

A unique multimedia production company specializing in cosmically creative content, for dome theaters, immersive experience enthusiasts, flat screens and astronomy outreach, and space music fans.

ngcicproject.org

home page of the ngc/ic project

skymaps.com

quality sky maps (star charts) for skywatchers, educators and publishers. the evening sky map (pdf) free each month. find constellations, planets, comets.

stargazing.net

stargazing network provide free web page hosting for the amateur astronomy community. stargazing network is sponsored by cetus technology at www.cetus.net.

stark-labs.com

Ask Craig Astrophoto Blog Fine Focus in Nebulosity Jan 15 09 11:41 We’ve covered focusing here a few times before, but I thought it would be worthwhile hitting it one more time with one more video. Previously, I’ve talked about fine-focusing in Nebulosity with a Bahtinov Mask and there is also a movie showing and […]