dawn
A first appearance; a beginning: the dawn of history. [1]
Dawn, as a mission belonging to NASA’s Discovery Program, delves into the unknown, drives new technology innovations, and achieves what’s never been attempted before. [2]
During dawn (and dusk) it is usually possible (provided that the sky is cloud-free) to see approximately in which direction the sun is (though it’s below the horizon). [...] Dawn should not be confused with sunrise, which is the moment when the leading edge of the sun itself appears above the horizon. [3]
This same measure of ambient light can be used to determine, conversely, the instant of dusk. [4]
N) the sun does not set at all at the summer solstice. [3]
In Dawn’s case, it is orbiting one member of the main asteroid belt, Vesta, before heading to gather yet more data at a second, Ceres. [...] Dawn’s goal is to characterize the conditions and processes of the solar system’s earliest epoch by investigating in detail two of the largest protoplanets remaining intact since their formations. [2]
This period of “bright nights” is longer at higher latitudes (further north). [3]
Under the instruction of the owner, Mr.Jinnah, it became the official organ of the Pakistan Muslim League in Delhi, and the sole voice of the Muslims in English language, reflecting and espousing the cause of the Muslims of India. [5]
The angular radius of the polar circle is equal to the angle between the plane of Earth’s equator and that of the ecliptic. [3]
Dawn is Pakistan ’s oldest and most widely read English-language newspaper. [...] “The Dawn will mirror faithfully the views of Hindustan’s Muslims and the All Hindustan Muslim League in all its activities: economic, educational and social and more particularly political, throughout the country fearlessly and independently and while its policy will be, no doubt, mainly to advocate and champion the cause of the Muslims and the policy and programme of the All Hindustan Muslim League, it will not neglect the cause and welfare of the peoples of this sub-continent generally”. [5]
During the summer of 2011, Dawn begins exploring new worlds at its first target, Vesta. [...] Visit often to see the latest news and data as we journey to the beginning of the solar system. [6]
Sources:
[1] dawn - definition of dawn by the Free Online Dictionary …
[2] Dawn Mission: Mission
[3] Dawn - Wikipedia, the free encyclopedia
[4] dawn: Definition, Synonyms from Answers.com
[5] Dawn: Information from Answers.com
[6] NASA’s Dawn Mission