Ad Astra 2000 Frank Sietzen Jr. - Abstracts
| Ad Astra 2000 Frank Sietzen Jr. | |||||
| Title | Subject | Authors | |||
|---|---|---|---|---|---|
| A new generation of (robotic) space explorers. | Astronomy | Frank Sietzen Jr. | |||
| Change is coming.(water on the planet Mars) | Astronomy | Frank Sietzen Jr. | |||
| Countdown: space launch's uncertain path. | Astronomy | Frank Sietzen Jr. | |||
| Risks and rewards of space exploration. | Astronomy | Frank Sietzen Jr. | |||
| Risks and rewards of space exploration.(Column) | Astronomy | Frank Sietzen Jr. | |||
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