"You should," Tommy said. "I only slept for a couple of hours at each warp-drive shift. We had a day-long stopover at Sirius Eighteen, and I took a tour of the planet. And I've spent a lot of time down here, just star-gazing—not that it did me much good. Which one is Antares? How do you tell it from Aldebaran? I'm always getting them mixed up."
Bart pointed. "Aldebaran—that's the big red one there," he said. "Think of the constellation Taurus as a necklace, with Aldebaran hanging from it like a locket. Antares is much further down in the sky, in relation to the arbitrary sidereal axis, and it's a deeper red. Like a burning coal, while Aldebaran is like a ruby—"
He broke off in mid-word, realizing that Tommy was gazing at him in a mixture of triumph and consternation. Too late, Bart realized he had been tricked. Studying for an exam, the year before, he had explained the difference between the two red stars in almost the same words.
"Bart," Tommy said in a whisper, "I knew it had to be you. Why didn't you tell me, fella?"
Bart felt himself start to smile, but it only stretched his mouth. He said, very low, "Don't say my name out loud Tom. I'm in terrible trouble."
"Why didn't you tell me? What's a friend for?"
"We can't talk here. And all the cabins are wired for sound in case somebody stops breathing, or has a heart attack in space," Bart said, glancing around.
They went and stood at the very foot of the quartz window, seeming to tread the brink of a dizzying gulf of cosmic space, and talked in low tones while Alpha and Beta and Gamma swelled like blown-up balloons in the port.
Tommy listened, almost incredulous. "And you're hoping to find your father, with no more information than that? It's a big universe," he said, waving at the gulf of stars. "The Lhari ships, according to the little tourist pamphlet they gave me, touch down at nine hundred and twenty-two different stars in this galaxy!"
Bart visibly winced, and Tommy urged, "Come to Capella with me. You can stay with my family as long as you want to, and appeal to the Interplanet authority to find your father. They'd protect him against the Lhari, surely. You can't chase all over the galaxy playing interplanetary spy all by yourself, Bart!"