Telescope Astronomy
Choose telescopes, align mounts, find objects, eyepiece selection, and urban vs dark-sky observing.
Who this is for
Stargazers buying and using their first telescope
Choose a task
Select starter telescope type
Align finder and mount
Observe Moon and bright planets
Keep an observation log
Workflows
Choose a guide that matches your task.
Astrophotography Stacking Guide
Complete guide for astrophotography stacking — step-by-step workflow, tools, checklist, and expert tips to get started.
Star Gazing Planning Guide
Complete guide for star gazing planning — step-by-step workflow, tools, checklist, and expert tips to get started.
Binocular Astronomy Start
Complete guide for binocular astronomy start — step-by-step workflow, tools, checklist, and expert tips to get started.
Telescope First Use Guide
Complete guide for telescope first use — step-by-step workflow, tools, checklist, and expert tips to get started.
Planet Observation Guide
Complete guide for planet observation — step-by-step workflow, tools, checklist, and expert tips to get started.
Deep Sky Imaging Guide
Complete guide for deep sky imaging — step-by-step workflow, tools, checklist, and expert tips to get started.
Lunar Photography Guide
Complete guide for lunar photography — step-by-step workflow, tools, checklist, and expert tips to get started.
Plan Safe Solar Viewing
Choose a solar viewing method, check viewers and instrument filters, brief your group, and save a source-backed observation checklist.
Meteor Shower Viewing Guide
Complete guide for meteor shower viewing — step-by-step workflow, tools, checklist, and expert tips to get started.
Satellite Tracking Guide
Complete guide for satellite tracking — step-by-step workflow, tools, checklist, and expert tips to get started.
Light Pollution Mapping Guide
Complete guide for light pollution mapping — step-by-step workflow, tools, checklist, and expert tips to get started.
Dark Site Trip Planning Guide
Complete guide for dark site trip planning — step-by-step workflow, tools, checklist, and expert tips to get started.
Tools for this topic
Search by name or purpose, or choose a tool category.
8 of 8 tools shown
Calculate exposure value from aperture, shutter speed, and ISO. Free exposure triangle (ev) calculator for camera exposure, lens settings, and print sizing.
Calculators
Calculate morning and evening golden hour windows for outdoor photography. Free golden hour timer calculator for camera exposure, lens settings.
Calculators
Calculate total daylight hours for a given latitude and date. Free daylight hours calculator for backpacking trips, trail planning, and day hikes.
Calculators
Reconcile two already comparable published stellar magnitudes in one photometric system and passband, with source, calibration, uncertainty, and report evidence retained.
Calculators
Calculate angular diameter of the Moon, Sun, planets, and deep-sky objects. Free angular size calculator converts physical size and distance to arcminutes.
Calculators
Reconcile one source-owned visual telescope and eyepiece train. Calculate magnification, exit pupil, and an explicit field model without hidden specifications.
Calculators
Calculate geometric radiant altitude and azimuth from declination, observer latitude and local hour angle. Supports degrees or sidereal hours.
Calculators
Free satellite orbit period calculator using Kepler's third law. Compute orbital period from altitude or semi-major axis for Earth satellites and space.
Calculators
Reusable tools
These tools already support the workflows in this niche field.
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