The progress of astronomy throughout the 20th century has seen enormous leaps: accelerating expansion of the universe, the Big Bang, black holes, supernovae, and so much more.

However, the invisible dark matter, which is necessary to explain the motion of galaxies, the invisible dark energy, which is essential to justify the acceleration of the universe's expansion, and the black holes, which erase ordinary matter just as a magician makes a rabbit disappear into his hat, shape the image of a universe that we struggle to grasp because we cannot observe an increasingly larger part of it.

By shedding light on what is aptly called the black triangle of our ignorance, the author attempts to pinpoint the biases that conceal such a large part of the universe from us, analyzing a series of possible delusions.

Is there indeed a deficit of matter in the universe? Could our observations be flawed? Are we seeing a two-dimensional holographic universe in three dimensions? Or are we perhaps living inside a black hole of cosmic dimensions, in a bubble-universe or on an island-universe?

In this particularly accessible book, leading astrophysicist David Elbaz examines fundamental questions that concern modern cosmology from a wholly different perspective.