How far is Wasp17b from Earth?

An artist's rendering encapsulating the interstellar journey from Earth to the distant exoplanet WASP-17 b, located 1,300 light-years away in the constellation Scorpius. Understanding the vastness of this 1,300-light-year chasm is essential when exploring the mysteries of the cosmos and the astonishing distances that astronomers traverse in their quest for celestial discoveries. Credits:NASA, ESA, CSA, Ralf Crawford (STScI)

Oct 16, 2023 -  In the realm of astronomy and space exploration, one question often stands out: How far is a celestial body from Earth? The universe's sheer vastness and the distances between cosmic entities can be staggering, leaving us in awe of the great cosmic theater. Among the many captivating celestial bodies in the cosmos, WASP-17 b, an exoplanet in the constellation Scorpius, has recently made headlines. But just how distant is WASP-17 b from Earth? In this article, we embark on a cosmic journey to unveil the secrets of this remarkable exoplanet and determine the precise astronomical gap between it and our home planet.

The Cosmic Neighborhood of WASP-17 b

WASP-17 b, affectionately known as Ditsö̀, is a hot gas giant residing in a distant corner of the Milky Way. It has piqued the interest of astronomers and space enthusiasts alike due to its intriguing properties, making it an object of study and curiosity.

Measuring Astronomical Distances

Before we dive into the specific distance between Earth and WASP-17 b, it's essential to understand how astronomers measure astronomical distances. In the vastness of space, standard units of measurement, such as kilometers or miles, become inadequate. Instead, astronomers rely on the astronomical unit (AU), light-years, and parsecs to express cosmic distances.

The Astronomical Unit (AU)

An astronomical unit (AU) is the average distance between the Earth and the Sun. It's a fundamental unit of measurement within our solar system, and it equals approximately 149.6 million kilometers or 93 million miles. While the AU serves well for our solar system, it's often insufficient for expressing distances to stars and exoplanets in other parts of the galaxy.


When it comes to interstellar distances, light-years are the unit of choice. A light-year represents the distance that light travels in one Earth year, at a speed of about 299,792 kilometers per second (or approximately 186,282 miles per second). It's a measure of both time and distance and is incredibly useful when gauging the vast cosmic expanses beyond our solar system.

The Journey to WASP-17 b

WASP-17 b, located in the constellation Scorpius, is situated at a staggering distance from Earth. To be precise, this intriguing exoplanet is approximately 1,300 light-years away! Now, what exactly does this mean?

Breaking Down the Distance

Understanding the concept of a light-year is vital when grasping the journey to WASP-17 b. A light-year is equivalent to about 9.461 trillion kilometers (or roughly 5.878 trillion miles). Therefore, when we say that WASP-17 b is 1,300 light-years from Earth, we're describing an astronomical gap of approximately 12.29 quadrillion kilometers (or around 7.644 quadrillion miles)!

This immense distance underscores the vastness of our galaxy, the Milky Way, and the enormous cosmic distances involved in studying exoplanets like WASP-17 b. WASP-17 b's location 1,300 light-years from Earth reminds us of the staggering distances involved in our cosmic explorations. This exoplanet serves as a beacon, encouraging us to continue our quest to unravel the mysteries of the universe. In understanding the vast gap between us and WASP-17 b, we gain a fresh perspective on the grandeur of the cosmos and the boundless opportunities for future astronomical discoveries.