• In the orbit of a planet or comet about [ or ( a ) round ] the Sun ...
• A solar ( or circumsolar ) or bit .
• In the orbit of a planet or comet about [ or ( a ) round ] the Sun ...
• A solar ( or circumsolar ) or bit .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012