 | A fact from HD 179821 appeared on Wikipedia's Main Page in the Did you know column on 3 January 2013 (check views). The text of the entry was as follows:
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A few problems here
editIt is estimated the star has been losing ~4 × 10-4 M⊙ yr-1 for about 1800 years and in last ~104 the star has lost ~10% of its initial mass
In "last ~104" what? Months? Years? And why ~104, not 1000?
HD 179821 has a cold detached dust shell which is very approximately circular in shape and has an inner diameter of ~3".3, corresponding to 3.0 × 1017 cm
"~3".3"? What does this mean? And why is the next figure given in centimetres, not metres or kilometres?
While most authors consider HD 179821, others think is actually a protoplanetary nebula
The first phrase of this makes no sense as written. — Preceding unsigned comment added by 66.232.252.133 (talk) 12:17, 3 January 2013 (UTC)
"since its discovery"
editThe phrase "since its discovery" always provokes the question "When was that?" --Wetman (talk) 17:47, 3 January 2013 (UTC)