When you get right down to it, you'll find the hidden robot pretty quickly. Don't forget to write two down, as well.
The robot concealed in this riddle is:
The droid R2D2 from Star Wars.
When you get right down to it, you'll find the hidden robot pretty quickly.
'When you get right (R) down (D) to (2) it' yields 'RD2'.
Don't forget to write two down, as well.
Add ('write down') another '2' between the 'R' and 'D', and you have R2D2.
Re the title:
R2D2 is a character in the Star Wars movie franchise.
PS In addition to its use as outlined above, the second sentence of the riddle can also be seen as pointing towards the answer in a different way:
'write two down, as well' could be directly parsed as: write (R - since 'writing' is one of 'the three R's') two (2) down (D), as well ('too' - 2).
Hidden in the stars
I think the answer is Pollux in the constellation Gemini
This depends on your viewpoint but if you arrange the twins to look like human figures, Pollux is on the right