by Dr. Jason Lisle | Sep 26, 2025 | Astronomy, Physics, Refuting the Critics
This article series will be very important for those interested in the distant starlight issue. Secular astronomers claim that the light from the most distant galaxies has taken billions of years to reach Earth. We can see these galaxies in our most powerful telescopes. Many people conclude from this that the universe must be billions of years old, and therefore that the biblical description of creation is false. But the notion that light takes billions of years to get from distant galaxies to Earth is predicated upon a particular modern convention of how we choose to define the timing of distant events.
by Dr. Jason Lisle | Jul 13, 2024 | Physics, Refuting the Critics
Did Phillip Dennis actually disprove the conventionality thesis (Dennis 2024)? Did he really prove at long last what physicists over the last century have been unable to do – to establish that the one-way speed of light in any given direction must be the same as the round-trip speed of light? Did he find any genuine inconsistency with the Anisotropic Synchrony Convention (ASC) and the young universe model upon which it is based? Well, no to all of the above…. We show below that when the full synchrony-independent equations are used, they do not support Dennis’s conclusion but rather the opposite. Furthermore, we will demonstrate several critical errors in Dennis’s analysis and show that several of his claims are incompatible with the physics of relativity.
by Dr. Jason Lisle | Dec 4, 2020 | Apologetics, Astronomy
We may freely stipulate the speed of light in any one direction to be anything between ½c and infinity, and the return-trip speed is set by the constraint that the average speed of light must always be exactly c in vacuum (186,282.397 miles per second). We here explore additional objections to the conventionality thesis. These have all been refuted in the technical literature within the past century. But few people have access to such literature, and so a review is expedient.
by Dr. Jason Lisle | Nov 13, 2020 | Apologetics, Astronomy, Physics
We will here investigate common objections to the conventionality thesis[1] – the principle that the one-way speed of light cannot be measured but is instead stipulated.
by Dr. Jason Lisle | Oct 30, 2020 | Apologetics, Astronomy, Physics
We previously introduced this distant starlight issue and then examined potential solutions and their difficulties. We now move toward a solution to the issue. This solution is surprisingly straightforward, but will require some discussion of the nature of space and time as we now understand them. To that end, we will here investigate the concept of simultaneity and how this concept has developed over time.
