Pretty good inking style.
Some missing highlights and shadows.. but not too bad.
I kinda liked the Astronaut in without the blacks, as it made him more of a background object.
- The sun ? (williams logo on it) would not have a "dark side" to it... but in some ways, it works regardless.
- The astro. leg snipe... its best to use a featured line that exists, to follow the cut-off. For example, cut off his left side stump at the first line, that starts at his crotch. Follow the same angle of the line all the way across the cut off.
- Another method of cut-off, is to use a jagged edge fade... much like Asian inked lettering.
- Inked works, tend to work better, when there is a black outline on all objects. It would help for example, separating the moon from the rocket. Other methods are to invert colors on the breakups... however, that would not work with this kind of piece.
- Whatever method you use to shade... should be duplicated equally on all objects. Except when depicting depth... for example, objects in a distance should be less detailed, and have less shading contrast. Where as objects nearest, should have greatest details, with highest contrast shading.
- Use of a banner / logo .. or broad or pinstripe lines... could also act as a separation level for the astronaut cut-off.
- If you are sticking with grayscale, then space might be better kept pure black.
- If you are using blues, maybe better to also use black as the color for space.. and the blue as a dark-highlight. Use white or yellow for the light-highlights (each on opposite sides of all objects) This simulates dual lighting, such as a sun on one side.. and a dimmer moon/planet-light ... on the other. And or at least adds a "cool" color to represent the shadows, without going full black... and or an accent added as a step in between black.
- The art does look a bit busy... and a little flat. To help this... you might consider changing the various sizes of objects. If the Rocket is in front... then leave that as the largest object, and shrink the moon a little... and make the full astronaut 1/3 rd in size. Or reverse that... and make the moon 1/3rd its size... and just reduce the astronaut size to 3/4ths its current size .. keeping the rocket as the main focus.
- Remember, that the Rockets flame tail, is a source of light. It should be bright, and it should light up edges of the rocket that are near it.