"I know that I must have kicked up a fuss. You don't have to spell it out for me." "Read it," the chief said impatiently. Jordan took back the stellogram and examined it. It read. To: Captain Lawrence Macrae Detection Agency, Grismet. From: Prantal Aminopterin Delegate from Casseiopeia Chairman, Grismet Peace Committee of the Galactic Senate.
He made accurate observations of its distance from the nine principal stars in Casseiopeia, and proved that it had no measurable parallax. Later he employed the same method with the comets of 1577, 1580, 1582, 1585, 1590, 1593, and 1596, and proved that they too had no measurable parallax and must be very distant.