Helium, Hydrogen (elements in stars and planets).
Hubble (astronomer and telescope).
Hercules (constellation)
Heliocentric theory.
Hypergiant (star).
HR diagram.
Hubble. Edwin Hubble was an astronomer and there is a telescope in space named after him.
Heliosphere - the magnetic field around the solar system created by the the sun.
Try Telescope, Triton or Titan.
· Hubble telescope
astronomy
ἀστρονομία
No.
A Yagi antenna, which can be used for radio astronomy.
When it is at the start of a sentence.
you can use the word an if the word after it begins with a vowel
Astronomy.
Hubble telescope is a space word. It begins with the letter h.
Hexagon (:
habitation
Flares is a space word. It begins with the letter f.
happen
Hazel Hockey
hair
Half
haughty
halogenheliumhydrogen
moon