astro/ject
astronaut
somebody who travels to space (the stars)
autobiography
a book about somebody's life written by that exact person
postpone
to set for another day or time after the original day or time
spectator
somebody who watches something
triangle
three-sided shape
astronomer
someone who studies the stars
autograph
a self-written signature
postmark
the marking on a stamp after it's been used
spectacles
eyeglasses (to help you see better)
triceratops
a three-horned dinosaur
projected
thrown upwards into the air
automatic
done by itself
postseason
after the sport's season
inspect
to see closer for a better look
tripod
rejected
thrown out
automobile
a vehicle that you can drive yourself
postgraduate
after you graduate
spectacular
tricycle
a three-wheeled vehicle