Telephoto lens
/ / / Telephoto lens / /
Pegasus rocket
/ / / Pegasus rocket / /
Extensive Air Shower-EAS
/ / / Extensive Air Shower-EAS / /
Sagittarius Dwarf Elliptical Galaxy(SagDEG)
/ / / Sagittarius Dwarf Elliptical Galaxy(SagDEG) / /
Moon halo
/ / / Moon halo / /
Orbital perturbations
/ / / Orbital perturbations / /
Antlia Galaxy
/ / / Antlia Galaxy / /
Beidou positioning system
مکان یاب بیدو / / / Beidou positioning system / /
Mean motion
/ / / Mean motion / /
Drag
/ / / Drag / /
