Edwin Hubble

The history of astronomy is a history of receding horizons.

Equipped with his five senses, man explores the universe around him and calls the adventure Science.

The velocity-distance relation is linear, and the ratio of the velocity to the distance is constant.

We do not know why the universe is expanding, but we do know that it is expanding.

The universe is not static; it is expanding.

The outstanding feature of the universe is its expansion.

The observable region of the universe is finite.

The universe is a great deal bigger than we thought.

The universe is not only stranger than we imagine, it is stranger than we can imagine.

With the help of the 100-inch telescope, we have pushed the horizon back to a distance of 500 million light-years.

The universe is homogeneous and isotropic.

The universe is a closed system, finite in space and time.

The universe is not static, but dynamic.

The universe is a vast collection of galaxies, each containing billions of stars.

The universe is expanding, and the galaxies are receding from each other.

The universe is a great adventure, and we are just beginning to explore it.

The universe is a mystery, and we are trying to solve it.

The universe is a beautiful place, and we are lucky to be a part of it.

The universe is a vast and empty place, but it is full of wonder.

The universe is a challenge, and we are rising to meet it.