Are there any known exoplanetary systems with multiple Neptune-like planets?
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- What are the proposed mechanisms for the confinement of these arcs?
- What is Neptune's density in g/cm³?
- How did Triton become a captured moon?
- How does Triton's thin atmosphere affect its surface temperature?
- What are Neptune's lower-altitude clouds made of?
- How were Neptune's rings discovered?
- What are the advantages and disadvantages of different types of space missions to Neptune?
- How does Neptune interact gravitationally with the other outer planets?
- What are the photochemical reactions that occur in Neptune's upper atmosphere?
- How can improved telescopes and instruments enhance our spectroscopic studies of Neptune?
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