Transit of Europa, Ganymede, and Callisto| August 2021

When you look at Jupiter through a telescope, you usually see four moons lined up with the planet. From time to time, a moon may pass in front of Jupiter’s disc in an event called a transit. A transit is a rare event since it occurs only when at least one moon lines up with … Continue reading Transit of Europa, Ganymede, and Callisto| August 2021

Transit of Io | August 2021

The Galilean moons may sometimes cross the disc of Jupiter as viewed from the Earth in an event called a transit. This image of the moon Io transiting Jupiter was taken on August 8, 2021, from Bacoor, Cavite, using a 4-inch f/9 refracting telescope and an ASI 533 astronomy camera. For a complete list of astrophoto images, click here.

Venus Transit | June 2012

A rare astronomical event occurred in June 2012, visible in the Philippines and widely documented among astronomy enthusiasts. This event is called the Venus Transit, in which the planet Venus, appearing as a small dot, is observed to transit or move across the disk of the Sun. Venus and a number of sunspots are visible … Continue reading Venus Transit | June 2012

Ultra-Portable Tracker Setup

This project has been featured in HACKADAY. Due to Earth’s rotation, objects in the sky appear to move from east to west. Taking a long-exposure photo of stars using a camera on a non-tracking mount will produce trails. To compensate for the Earth’s rotation (and minimize trailing), a tracker as simple as a geared stepper controlled can be … Continue reading Ultra-Portable Tracker Setup


This page features images taken with a small (4 inch diameter) backyard telescope with a home-brewed tracking system. Astrophotography-related articles on how to capture and process images, as well as observations of astronomical events, are also posted on this page. For a complete list of astrophoto images, click here. Getting Started with AstrophotographyHow to Take Photos … Continue reading Astrophotography

DSLR for Astrophotography

A T-ring is a metal adapter with one end that fits on a lens mount and with the other end that connects to a T-adapter. Each camera brand has it’s own T-ring design. The T-adapter connects any T-ring to a telescope. The Canon EOS T-ring shown in this setup is produced by Celestron. Some telescopes … Continue reading DSLR for Astrophotography