The Virtual Educational Observatory
Radio Astronomy of Pulsars
The Large-Scale Structure of the Universe
The Revolutions of the Moons of Jupiter
Jupiter’s Moon & the Speed of Light
The Rotation of Mercury by Doppler Effect
Astrometry of Asteroids
The Flow of Energy Out of the Sun
The Period of Rotation of the Sun
Transits of Venus & Mercury
Spectral Classification of Stars
Photometric Photometry of the Pleiades
HR Diagrams of Star Clusters
Dying Stars & Birth of Elements
The Hubble Redshift Distance Relation
The Quest for Object X