Tools

ASTRONOMY

Calculators

• Conversion Calculator - NELM (V) to MPSAS (B) systems
• Earth Impact Effects Program
• Impact: Earth!
• Oceanography (Puertos del Estado)
• Tabla de mareas

Ephemerides

Artificial satellites

• Real Time Satellite Tracking
• Space Track

Eclipses

• Eclipses Online Portal (HM Nautical Almanac Office)
• NASA Eclipse Web Site (by Fred Espenak)

General

• NeoProgrammics
• VO Solar System Portal
• USNO Data Services

Meteor showers

• FLUXTIMATOR - NASA
• IMO Meteor Shower Calendar
• Major Meteor Showers
• Red de Investigación sobre bólidos y meteoritos

Solar System

• Astronomical Sky Calendar (by Brian Casey)
• Aurora Sky Station
• Heavens-Above
• JPL Solar System Dynamics
• Moon Phase and Libration, 2017 (NASA)
• Solar Cycle Prediction (NASA/Marshall Space Flight Center)
• Space Weather Prediction Center (SWPC)

Maps

Celestial

• Skymaps.info
• The Evening Sky Map
• Your Sky

Terrestrial

• Earth and Moon Viewer
• iTouch Map (Latitude and longitude of a point)

Time

• Hora atual (LNE-SYRTE)
• StarDate Online
• The ISO 8601 Date Format (by Markus Kuhn)
• The World Clock - Time Zones

Tools

• ASTRONET (Carl Koppeschaar)
• Astronomy Tools
• Astronomy Workshop Tools

GEODESY

• Earth Gravitational Model 2008 - EMG2008 (National Geospatial-Intelligence Agency)
• Earth Orientation Centre (EOP)
• European Terrestrial Reference System 89 (ETRS89)
• Geographiclib (Online geodesic calculations)
• Geoscience Australia (Geodetic online calculations)
• Google Earth
• IERS Rapid Service/Prediction Center
• International Centre for Global Earth Models (ICGEM)
• International Geoid Service (IGeS - IAG)
• National Centers for Environmental Information (NOAA)
• Planiglobe
• Upcoming earthquakes (IGN)
• UNAVCO
• Geodesy (IGN)
• Visor Iberpix (IGN)

INFORMATICS

• A não tão pequena introdução ao LaTeX
• Online Broken Link Checker
• StatCounter
• WikiHow
• W3C Markup Validation Service
• Zonas wifi