Explanation

Gigantic clouds of dust and gas in space are called nebulae

Primarily hydrogen and helium, plus dust (silicates, carbon, ice). 

Occupying the space between stars and acting as a nursery for new stars

Explanation

The book The Indian Musalmans, published in 1871

Author: Sir William Wilson Hunter.

The book discusses the social and political conditions of Muslims in India during British rule.

Explanation

The Adidas Brazuca, the official ball for the 2014 FIFA World Cup,

It was primarily by Forward Sports in Sialkot, Pakistan

 Adidas has been a FIFA Partner and FIFA World Cup official match ball supplier since 1970.

The Adidas Brazuca was the official match ball of the 2014 FIFA World Cup, which was held in Brazil.

The name of the ball was announced on 2 September 2012

Explanation

Viticulture is the science and practice of growing and harvesting grapes,

It is a branch of horticulture

Viniculture (or Enology): The study and practice of winemaking (fermentation and processing).