The sun isn’t sitting still. Right now, it’s carrying Earth, every other planet, and everything on them through space at roughly 140 miles per second — aimed at a fixed point in the sky that astronomers have quietly known about for years.
That destination has a name. And this May, for the first time all year, anyone in the Northern Hemisphere can step outside on an ordinary evening, look northeast, and find it.
The sun has a destination — and astronomers gave it a name
Astronomers call the sun’s direction of travel the solar apex — or, in older and more poetic phrasing, the apex of the sun’s way. It’s a precise point on the celestial sphere, located in the constellation Hercules at coordinates 18 hours 28 minutes right ascension, 30 degrees north declination. That places it southwest of the brilliant star Vega — not directly on top of it, but close enough that Vega works as a reliable naked-eye landmark.
This is neither metaphor nor abstraction. Astronomers pinpointed the solar apex by carefully measuring the motions of nearby stars relative to the sun. Because the sun moves through its galactic neighborhood, surrounding stars appear to drift — and by tracking that drift, scientists could work backward to identify exactly which direction the sun is heading. The math is precise. The motion is real.
Why Vega is your guide to the solar apex in May
Vega belongs to the constellation Lyra the Harp, and it’s difficult to miss: a bright, blue-white point of light that stands out immediately against a dark sky. Its proximity to the solar apex makes it the most useful naked-eye marker for visualizing the sun’s direction of travel.
May turns out to be the ideal month for this exercise, at least from the Northern Hemisphere. Vega rises in the northeast during early evening hours, climbing into view while most people are still awake and outdoors. The Milky Way, meanwhile, lies as flat along the horizon as it does at any point in the year — a detail that quietly situates our entire solar system within its galactic context.
Southern Hemisphere observers aren’t excluded, but the timing is less convenient. On May evenings, Earth’s own bulk blocks Vega from view at southerly latitudes, and those observers need to wait until the predawn hours, when the planet’s rotation finally brings Vega above the northern horizon.
A cosmic sidewalk: how stars reveal the sun’s motion
Picture a busy sidewalk. Most people move at roughly the same pace, staying close together in the crowd. But if one walker moves slightly faster than the rest, the people ahead appear to spread apart while those behind seem to bunch up.
The sun behaves like that faster walker — traveling at a slightly higher velocity than the mean speed of its neighboring stars. Over hundreds of thousands of years, the stars near the solar apex appear to drift outward and away. On the opposite side of the sky, near the solar antapex, stars appear to converge and cluster together.
The European Space Agency, using data from its Gaia space telescope, produced an animation that makes this visible. Scientists extrapolated the motions of 40,000 stars — all within 326 light-years of the sun — across 1.6 million years. Stars diverge from the solar apex and converge toward the antapex, exactly as the physics predicts. That antapex sits near Sirius, the brightest star in Earth’s sky, meaning Vega and Sirius occupy nearly opposite positions on the celestial sphere: one marking where we’re going, the other where we’ve been.
Just how fast — and how far — is the sun really traveling?
The sun orbits the center of the Milky Way at roughly 140 miles per second — about 225 kilometers per second. That’s the speed at which everything you’ve ever known, every person, every structure, every record of human history, is currently moving through space.
Even at that velocity, one full circuit of the galaxy takes approximately 230 million years. Astronomers sometimes call that span a cosmic year. The last time the sun occupied its current position in its orbit, dinosaurs had not yet appeared on Earth.
The Milky Way spans an estimated 100,000 light-years and contains several hundred billion stars. These numbers resist compression into human intuition — but they give the solar apex its true weight. Not a small drift. An ancient, ongoing journey through a structure of almost incomprehensible scale.
How to find Vega — and feel the motion yourself
From mid-northern latitudes, step outside around 8:30 to 9 p.m. local time on any May evening and look northeast. You’re looking for a bright star with a distinctly blue-white color. That’s Vega — and the solar apex lies just to its southwest.
If your horizon is clear, glance toward the southwest at the same time. Sirius, the sky’s brightest star and the marker for the solar antapex, may still be visible low in the fading twilight. In that single glance — Vega rising in the northeast, Sirius setting in the southwest — you can bracket the sun’s entire line of travel across the sky. For precise timing from your specific location, Stellarium Online can show you exactly when and where to look.
There’s something worth pausing over in that moment. Every civilization that has ever existed, every landscape ever mapped, every living thing that has ever drawn breath — all of it has been part of this slow, enormous journey, aimed at a point near a blue-white star that anyone can find on a clear May night. The universe doesn’t pause for us to notice. But May offers a straightforward chance to look up and notice anyway.