This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2730 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In typography, a star is any of several glyphs with a number of points arrayed within an imaginary circle. A commonly used star symbol is the asterisk.
Representations
System
Representation (click value to copy)
Nº
10032
UTF-8
E2 9C B0
UTF-16
27 30
UTF-32
00 00 27 30
URL-Quoted
%E2%9C%B0
HTML hex reference
✰
Wrong windows-1252 Mojibake
✰
Encoding: GB18030 (hex bytes)
81 37 C0 36
LATEX
\ding{80}
RFC 5137
\u'2730'
Bash and Zsh inside echo -e
\u2730
C and C++
\u2730
C#
\u2730
CSS
\002730
Excel
=UNICHAR(10032)
Go
\u2730
JavaScript
\u2730
Modern JavaScript since ES6
\u{2730}
JSON
\u2730
Java
\u2730
Lua
\u{2730}
Matlab
char(10032)
Perl
"\x{2730}"
PHP
\u{2730}
PostgreSQL
U&'\2730'
PowerShell
`u{2730}
Python
\u2730
Ruby
\u{2730}
Rust
\u{2730}
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