| For many years there had been a controversy concerning certain spiral nebular objects found in the night sky. |
| Once its core reached about 10 Earth masses, gravitational attraction captured the surrounding nebular gas and built up the gas giant planet we observe today. |
| It might rather be said that it is inconceivable on the nebular theory how a system of this form could be constructed at all. |
| With the 100-inch Isaac Newton Telescope in the Canary Islands, they looked for the patterns and colors of nebular gas in their patch of sky. |
| The outcome for a particular planetary system might be wildly different if the nebular gas is expelled sooner or later than in our system. |
| Voyaging through the Milky Way, they will stop off at a fantastic nebular region. |
