A man in a blue robe sits at a table, his right hand resting lightly on a celestial globe while his left supports an open book. He leans forward, intent on his study, with his gaze fixed on the globe, suggesting concentration and curiosity. The table is covered with a richly patterned cloth in deep blue and gold, its folds and textures rendered with meticulous attention.

Light streams in from a window on the left, illuminating the man's face, the globe, and the open book, while the rest of the room recedes into shadow. A framed painting hangs on the right wall, its subject just discernible in the dim light. The composition is carefully balanced, with the globe and the man's figure forming a diagonal that draws attention to the act of study.

The brushwork is smooth and precise, especially in the rendering of fabrics and the subtle play of light across surfaces. Touches of gold and ochre in the cloth and globe contrast with the cool blues and greys of the man's robe and the shadowed background. The scene is intimate and quiet, capturing a moment of solitary investigation.

A rectangular window with multiple glass panes occupies the upper left corner, casting a geometric pattern of light and shadow onto the wall and table. Behind the man, a large wooden cabinet stands against the back wall, its surface partly obscured by shadow and topped with several indistinct books or objects. A sheet of paper with diagrams or writing is pinned to the cabinet, its pale surface catching some of the incoming light.

In the lower right corner, the dark back of a chair is visible, with a small rectangular label or slip of paper attached to its backrest. The Astronomer is created by Johannes Vermeer and dated to circa 1668. The work belongs to the Baroque movement and is considered genre art, depicting a man engaged in the study of astronomy and astrology.