Serenely

The astronaut lost his grip on the wrench and all he could do was watch in dismay as it floated serenely away.

Source: tatoeba (644647)

Serenely I take my first step towards eternity and leave life to enter history.

Source: tatoeba (1305341)

He's not beaten by the rain; he's not beaten by the wind; neither the snow nor the heat of the summer will beat him; his body is robust, without greed; he never angers, but is always serenely smiling.

Source: tatoeba (2378774)

I look out on the brilliant heaven, and see a milky way of powdery splendour wandering through it, and clusters and knots of stars and planets shining serenely in the blue frosty spaces; and the armed apparition of Orion, his spear pointing away into immeasurable space, gleaming overhead; and the familiar constellation of the Plough dipping down into the west; and I think when I go in again that there is one Christmas the less between me and my grave.

Source: tatoeba (5680781)