The phrase "a formidable object" is correct and usable in written English.
It can be used to describe something that is impressive, powerful, or intimidating in nature.
Example: "The ancient castle stood as a formidable object against the backdrop of the stormy sky."
Alternatives: "an imposing figure" or "a daunting presence."
This photograph did a lot to popularise its subject, and can almost be seen as a collaborative artwork: the formidable object the artist holds, her feather fur coat and her extraordinary smiling features conspire with Mapplethorpe's intensely charged monochrome.
All the same, the Decca set is a formidable and gorgeous object.
Furthermore, modeling the aerodynamic forces that act on low altitude satellites is a formidable task, especially for objects of a complex shape and unknown attitude evolution.
Under their leadership, it grew from a one-room museum with a collection of 184 objects, and deeply in debt, to a formidable institution with many masterpieces among its 4,000 objects.
Ethologically, voices are the second major channel via which we identify other people, while perceptually, individual voices (like faces) present the brain with a formidable problem of precise differentiation and identification within a class of complex sensory objects.
Proving a drone's ability to spot and avoid collisions with humans and objects (trees, powerlines, each other) – especially in more populated areas – remains a formidable challenge.
The gentle grasping and manipulation of objects in dense un-structured environments, such as the agricultural, food processing, or home environments constitute a formidable challenge for robotic systems.
The processing of auditory scenes is a formidable and multicomponent computational problem, requiring deconvolution of a complex, dynamic sound mixture and accurate perceptual representation of auditory objects embedded in the scene (Griffiths and Warren, 2002; Goll et al., 2010).
The great wave of decolonization that swept through Asia and Africa following WW2 had struck, at the tip of Africa, a formidable anomaly, if not an immovable object: a regional superpower with a modern industrial economy, a ferocious race-based police state, and a large, well-armed and deeply rooted white minority.
