Word: planetsized
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Dates: during 1990-1999
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Astronomers have long been convinced that the universe must be filled with planets orbiting faraway suns. In the past couple of years, scientists have even detected such planets indirectly, by measuring the wobbles their gravity imposes on their host stars. But no one expected actually to photograph any of these...
Bringing metaphors of nature back into abstraction (or rather, perhaps, using abstraction to distill natural processes) lay at the core of his finest work. This he shared with Miro, whose sense of nature never deserted him and who scarcely ever painted a pure abstraction. Miro's moons and planets and...
Hartmann said he does not think the presence of planets will be detected any time soon.
"I think for a long time the evidence is going to have to be indirect," Hartmann said. "One possibility is that the planets might cause ripples in the disk because of their gravity."
According to Hartmann, HR 4796A, a star about 20 times more luminous than the Sun, is "about 8 to 10 million years old" which he said is around the age at which planets are estimated to form.