The discovery of a fourth gas giant around the star HR 8799 doesn’t seem like that big a deal, but it’s become the latest flashpoint for a highly controversial and often intense debate about how gas planets are born…..
“I have been publishing models for 10 years showing disk [instability] models that form gaseous protoplanets at these distances and even closer. This really is more of a religious split than a scientific one.”….
“This kind of system is excellent for [understanding] planet formation because it reminds us that we don’t know as much as we would like, and it’s a new challenge.”…
(click on the title to read complete article….)