astrophotometry
(1)天体光计学
(2)天体光度测量，天体测光

• ion contamination
• ion-diple bond
• Ion emission
• ion exchange
• ion exchange chromatorgraphy
• Ion-exchange electrolyte cell
• ion exchange resion
• Ion exchange technique
• ion focujsing
• ion gas laser
• ion grid theory
• ion-heated cathode
• ionic birefringence
• ionic bonding force
• ionic crystal
• Ionic focusing
• ionic link
• ionic polarizaton
• ion image
• ion implantation
• ion implantation equipment
• tilted-plate test
• tilted surface
• tilt graticule
• tilt head