Niharika (निहारिका) is the Sanskrit word for "galaxy" or "mist" — particularly the misty light of distant stars. The Hindi word for nebula derives from the same root.
Niharika is widely used in India.
Niharika does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Niharika reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.