天文学Alexa排名

401. Bima.astro.umd.edubima.astro.umd.edu

网站简介:A consortium consisting of a radio astronomy laboratory, a laboratory for astronomical imaging, and a laboratory for millimeter-wave astronomy.

402. Texasastro.orgtexasastro.org

网站简介:News, calendar, gallery, store, library, and bulletin board.

403. Starstryder.comstarstryder.com

网站简介:Blogging the sky one sidereal day at a time.

404. Ofa.grofa.gr

网站简介:General information, activities, and news. [Site in English and Greek]

405. Mi.astro.itmi.astro.it

网站简介:Information and services, research, publications, seminars, highlights, and links.

406. En.wikipedia.org/wiki/Fermi_paradox

网站简介:Encyclopedia article summarizing the concept.

407. Konus.comkonus.com

网站简介:Italian manufacturer of telescopes, binoculars, spotting scopes, microscopes, compasses and magnifying glasses.

408. Learningastronomy.comlearningastronomy.com

网站简介:Learn about the universe by looking at animations, videos and photographs. Includes sections on backyard astronomy, earth and moon, the solar system, stars and galaxies.

409. Focuser.comfocuser.com

网站简介:Extremely robust Crayford style focusers, focuser accessories, truss tubes and truss tube connector systems, plus telescope accent kits to personalize your telescope.

410. Celestialnavigation.netcelestialnavigation.net

网站简介:An annotated hub site of resources relating to navigating by the stars, including theory, practice, history, instruments, and classroom links.

411. Comfychair.org/~cmbell/myth/myth.html

网站简介:Classical Greek and Roman myths.

412. Ccd.comccd.com

网站简介:Develops high performance CCD cameras.

413. Mtwilson.edumtwilson.edu

网站简介:An astronomical research facility located in the San Gabriel Mountains of Southern California. Projects, outreach and education, history, FAQ, news,links and a virtual tour.

414. Stoff.plstoff.pl

网站简介:For radio amateur and observing purposes, and used by weather professionals, satellite communication users, astronomers, UFO hobbyists and astrologers.

415. Astronomy.swin.edu.au/sao/

网站简介:Online degree granting program in astronomy offering courses for Master of Science and Graduate Diploma of Science. Based in Melbourne, Australia.

416. Meteorite.commeteorite.com

网站简介:Information on meteorites, meteorite dealers, tektites, meteorite gallery, auctions, and free classifieds.

417. Vaticanobservatory.vavaticanobservatory.va

网站简介:Ancient astronomical research institution. Includes history, profiles of personnel, details of telescopes, and a streaming video on the relation of science and religion.

418. Spitzinc.comspitzinc.com

网站简介:Design, manufacture and installation of planetarium and dome-based immersive theaters. Includes profile, projects, resources and contact information.

419. Preciseparts.compreciseparts.com

网站简介:Custom telescope parts and one-of-a-kind components, designed and machined in aluminum, stainless steel, brass, bronze, titanium, Teflon. Re-manufactures hard to find replacement parts for vintage telescopes. Can design new parts per customer specifications.

420. Nineplanets.org/pluto.html

网站简介:Guide with both general and statistical data.

421. Windows2universe.org/sun/sun.html

网站简介:Overview including general information, data, pictures, news, historical and mythological background.

422. Saguaroastro.orgsaguaroastro.org

网站简介:In Phoenix, provides meeting schedules, newsletters, FAQ, gallery, observing notes, and downloads.ds.

423. Fourmilab.ch/solar/

网站简介:Interactive Orrery of the web with links to other software.

424. Radio-astronomy.orgradio-astronomy.org

网站简介:Dedicated enthusiasts who teach, learn, trade technical information, and do observations of the radio sky.

425. Astronomy.orgastronomy.org

网站简介:Astronomy information, history, support, photos, educational programs, and astrophotos.