Castaway Planet by Eric Flint, Ryk E Spoor

Lincoln?”
    “Presi—who?” Hitomi looked confused. “No, because that’s its color—like the clothes those men wore in that story!”
    “Those men—Oh!” Melody suddenly laughed. “You mean Robin Hood’s Merry Men, and they wore Lincoln green!”
    Laura smiled. “Well, I think that’s a perfectly good name. What do the rest of you say?”
    As Laura had expected, while obviously Sakura and Melody had hoped to name the planet (and, she admitted to herself, so had she), none of them wanted to disappoint the excited Hitomi. “Then Lincoln it is.”
    “Why are the oceans green?” asked Sakura. “I’d think they’d be blue, like Earth’s.”
    “It could be due to any number of reasons,” Caroline said. “A different mineral/particulate suspension in the water than we have on Earth. Or—”
    “An abundance of chlorophyll-bearing creatures,” their father interjected. He was smiling broadly, and pointed to the virtual display they could now all see, a pattern of dark bands on bright. “We’re down to those odds I couldn’t guess. Chlorophyll. A beautiful, unmistakable variation on chlorophyll, and a perfect indicator of life like our own. The other ecologies use other pigments.”
    As the meaning of the words sank in, the others cheered. Hitomi didn’t exactly understand, but she knew good news when she heard it, and cheered as well.
    “It’s possible it may even be a seasonal thing,” Akira continued. “Something like huge algal blooms that periodically make the sea brilliant green across most of the globe, then fade away. Even on Earth you can sometimes get very green water that’s visible from orbit.”
    Laura felt immense relief go through her. “Sakura?”
    “Yes, Mom?”
    “This is your Captain speaking, Navigator.”
    Sakura snapped her an exaggerated salute, grinning from ear to ear. “Yes, Ma’am! What are your orders, Captain?”
    “Set a course for Lincoln and give us an ETA.”
    “On it, Captain Mommy!”
    Sakura immediately went into conference with Caroline and Melody. Laura had to admit after a few moments that she honestly didn’t really understand the discussion. Unlike her offspring, physics calculations and orbits and vectors just didn’t interest her much. But she could tell the three girls were arguing over the best approach to use the Nebula Drive and heard terms including “constant acceleration,” “orbital transfer,” and “least-time course.” Whips drifted over and joined the debate. She noticed that the Bemmie’s normally smooth, flexible skin already had a fine network of lines over it, like dry human skin.
    After a few more minutes, Sakura nodded and the other three seemed to have reached agreement. The fourteen-year-old strapped herself back into the pilot’s chair and carefully manipulated several controls before turning back to them. “Deploying Nebula Drive dusty-plasma sail. According to calculations, ETA is three weeks.”
    Laura finally felt herself relax. That was well within Akira’s estimate of their food supply and, she thought, her ability to keep Whips in functional shape. It wasn’t going to be easy, no. But they had a livable destination, they could get there fast enough, and they had the tools and equipment they needed.
    The worst was over.

Chapter 7
    “Nebula Drive fully retracted. All smart dust now stowed away. Recovery of materials at 95%,” Sakura reported, partially to herself. The routine, reporting each detail of her tasks, helped calm her, slow the heart that threatened to accelerate out of control.
    It’s all on me .
    The thought was terrifying, more so because she knew she couldn’t show it. Melody and especially Hitomi could panic if they realized just how scared their older sister was.
    But she was scared. Lincoln now loomed up before them, as beautiful as it had been at first with drifting streamers and coils of white cloud across the green ocean and brown-green of islands and continents. It was the salvation they