Possible Clues:

• Frivolous, not following with attention a very long distance
• One is beset by appalling lethargy — it's too far for anyone to go!
• It's quite a distance and one is beset by strange lethargy
• Ray's annual coverage, astronomically large
• Disraeli's was in Heaven (but ended in the Other Place)
• About nine point five million million kilometres
• See 24
• One with lethargy shuffling a very long way
• Not a heavy time, by a long way
• I display lethargy about such a long way to travel