Rare, all-red auroras are produced by high-altitude oxygen, at heights of up to 200 miles. Nitrogen produces blue or purplish-red aurora. The connection between the Northern Lights and sunspot activity has been suspected since about 1880.
In developed countries, the average birth weight of a full-term newborn is approximately 3.4 kg (71â2 lb), and is typically in the range of 2.7â4.6 kg (6.0â10.1 lb).
The average weight for a baby at birth is approximately 3.4 kilograms. Newborns range in weight from 2.5 kilograms to 4 kilograms. This average weight is typical for a normal full-term Caucasian newborn.African American and Asian newborns have a slightly smaller weight at birth.ater makes up approximately 80% of a newborn's weight. After the first week and up to six months after birth newborns also gain about 0.198 kg a week. A premature baby weighs less than 2.7 kg.