Which of the following names is technically incorrect?

Crab Nebula
Great Andromeda Nebula
Orion Nebula
Horsehead Nebula
The Andromeda Galaxy is often referred to as the Great Andromeda Nebula in older texts. Before their nature was understood, galaxies were classified as nebulae, but no longer are. In 1864, William Huggins examined the spectra of about 70 nebulae. He found that roughly a third of them had the absorption spectra of a gas (so these were true nebulae). The rest, including Andromeda, showed a continuous spectrum and thus were thought to consist of a mass of stars.
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Answers by country

Crab Nebula
Great Andromeda Nebula
Orion Nebula
Horsehead Nebula
answers
flagCanada
15%
68%
5%
10%
19
flagFrance
8%
66%
0%
25%
12
flagPakistan
8%
64%
8%
17%
34
flagIndia
13%
63%
12%
11%
297
flagUnknown
10%
60%
17%
10%
28
flagthe United Kingdom
14%
58%
10%
16%
104
flagthe Philippines
15%
56%
15%
12%
32
flagthe United States
13%
53%
16%
16%
262
flagAustralia
7%
51%
9%
31%
41
flagRepublic of Ireland
9%
45%
27%
18%
11
flagGermany
21%
43%
11%
21%
108
flagGreece
30%
40%
10%
20%
10
flagPoland
14%
37%
16%
30%
5952
flagAustria
18%
25%
18%
37%
27