In these simulations, a larger dot means the star appears brighter.

Here are all the stars which show measurable parallax. Did you miss any of them?

• Which are closest to Earth?
• Which are furthest from Earth?
• Can you say anything about their actual brightness (also known as luminosity)?

A & D are closest to Earth -- they show the most parallax.

E is furthest from Earth -- it shows the least parallax. Of course all the stars with no parallax are even more distant than E.

Since E appears bright even though it is most distant, it must put out a lot more light than A, B, C, & D -- in other words, it is more luminous than A, B, C, & D. However, F & G both appear brighter than E and they are even further than E (they show no parallax at all). Thus they must be even more luminous than E. Beyond that we can’t say much about them -- we don’t even know that F is more luminous than G. They might both have the same luminosity but G might just be more distant. B & D appear equally bright, but B is more distant than D so it must be more luminous than D. C is closer than any star in the picture except A & D, but its apparent brightness is very low, so it must be a real “dim bulb” with very low luminosity.