tldrdailynews.com logo
Tag

Heliopause

All articles tagged with #heliopause

Voyager 1: In interstellar space yet still bound to the Solar System
science17 days ago

Voyager 1: In interstellar space yet still bound to the Solar System

Voyager 1 crossed the Sun’s heliopause into interstellar space in 2012, becoming the first human-made object in interstellar space, but it remains gravitationally bound to the Sun. Estimates place the Oort Cloud’s inner edge at about 2,000–5,000 AU and its outer edge at 10,000–100,000 AU, meaning the probe will take roughly 300 years to reach the Oort Cloud and up to 30,000 years to pass beyond it. The boundary it has crossed is about the solar wind boundary rather than the solar system’s final edge, and its power is fading as it continues the journey.

via Space Daily|
#heliopause#interstellar-space#oort-cloud
Beyond Neptune: the Sun's dominance reveals a vast, mostly empty solar system
science21 days ago

Beyond Neptune: the Sun's dominance reveals a vast, mostly empty solar system

The Sun accounts for about 99.86% of the solar system’s mass, so gravity is dominated by a single star while the rest is mostly empty space; the solar boundary extends far beyond Neptune to the heliopause (~120 AU), where Voyager 1 entered interstellar space in 2012 and Voyager 2 followed in 2018. Beyond lies the distant, inferred Oort Cloud that may reach up to a couple of light-years, while Planet Nine remains a hypothesis not yet confirmed.

via Space Daily|
#heliopause#oort-cloud#planet-nine
New Horizons Awakens for fresh edge-of-solar-system science
space1 month ago

New Horizons Awakens for fresh edge-of-solar-system science

NASA's New Horizons woke from a 321-day hibernation at the solar system’s edge with all systems reported healthy. The spacecraft has resumed science data transmission from about 5.9 billion miles from Earth (≈64 AU) and will study the heliopause and outer heliosphere with more sensitive instruments than the Voyager probes, sending data back across an ~8 hours 52 minutes light-time delay as it continues toward interstellar space.

via Live Science|
#heliopause#kuiper-belt#nasa
Voyager 1 and 2 Defy Time, Still Transmitting From Interstellar Space
space1 month ago

Voyager 1 and 2 Defy Time, Still Transmitting From Interstellar Space

Launched in 1977 for a five-year mission to Jupiter and Saturn, Voyager 1 and 2 are now the only human-made objects confirmed to operate in interstellar space, still receiving commands and sending data decades later. Built with redundant hardware and RTGs, they outlived their design life and crossed the heliopause in 2012 and 2018, respectively. As power fades by about four watts per year, NASA has turned off nonessential systems—most recently Voyager 1’s low-energy charged‑particle instrument in 2026—to extend life. A long-tenured team at JPL and NASA continues to operate the craft, aiming to preserve basic communications into the 2030s, though an unexpected fault could end either mission sooner.

via Space Daily|
#heliopause#interstellar-space#nasa
Voyager 1’s interstellar entry reveals a porous, imperfect solar boundary
space1 month ago

Voyager 1’s interstellar entry reveals a porous, imperfect solar boundary

Voyager 1 crossed the heliopause into interstellar space in 2012–2013, but the boundary proved porous and layered rather than a clean edge, with a sharp drop in inner solar-wind particles while galactic cosmic rays rose and the magnetic field did not rotate as expected. The crossing was confirmed by plasma-density oscillations from a March 2012 coronal mass ejection, and Voyager 2 later crossed the boundary in a different region with similar results. The inner region remains poorly understood, and both spacecraft—now low on power—continue to return data as they drift through the outer reaches of the solar system.

via Space Daily|
#heliopause#interstellar-space#magnetic-field
Voyager 1 Endures at the Edge of Space on Tiny Nuclear Power
science1 month ago

Voyager 1 Endures at the Edge of Space on Tiny Nuclear Power

Voyager 1, launched in 1977, is now about 25 billion kilometres from Earth, so far that radio signals take more than 22 hours to reach it; it continues to send back data from interstellar space using a nuclear power source the size of a car battery. Its plutonium generators now deliver ~230 watts (down from ~470 W at launch), fading about 4 watts per year, leading NASA to progressively shut down nonessential systems to extend the mission into the 2030s. Two instruments remain active as it drifts beyond the heliopause, with signals traveling via NASA’s Deep Space Network, a faint whisper from humanity's farthest probe.

via Space Daily|
#deep-space-network#heliopause#interstellar-space
Voyager 1 Reaches 1 Light-Day Milestone From Earth
space1 month ago

Voyager 1 Reaches 1 Light-Day Milestone From Earth

NASA has announced that Voyager 1 will reach 1 light-day from Earth on November 18, 2026—about 16.1 billion miles (25.9 billion km, 173 AU). Launched in 1977, it left the solar system in 2012 and remains the most distant human-made object in contact with Earth, though many instruments are powered down to conserve energy. Voyager 2 is about 2 billion miles closer to Earth than Voyager 1 and travels in a different direction; both carry golden records as a symbol of Earth.

via EarthSky|
#distance-from-earth#heliopause#light-day
Voyager 1 Keeps Coasting Toward a Light-Day Milestone
space2 months ago

Voyager 1 Keeps Coasting Toward a Light-Day Milestone

Voyager 1, launched in 1977, remains the fastest and most distant human-made object, cruising at about 17 km/s with no engine. It has crossed the heliopause into interstellar space and sits roughly 25 billion kilometers from the Sun (about 170 AU). NASA expects it to reach about one light-day from Earth by November 2026, a distance at which light takes a day to reach Voyager and come back. Power is fading—from an initial ~470 watts to well under half—so engineers are shutting instruments offline; only two remain as the team plans further power-saving steps. When power runs out, Voyager 1 will go quiet but continue coasting for thousands of years, not aimed at any particular star (in ~40,000 years it will pass about 1.6 light-years from Gliese 445).

via Space Daily|
#heliopause#interstellar-space#light-day
NASA downshifts Voyager 1 instrument to stretch its interstellar voyage
space4 months ago

NASA downshifts Voyager 1 instrument to stretch its interstellar voyage

NASA engineers shut down the Low-energy Charged Particles (LECP) instrument on Voyager 1 on April 17 to conserve dwindling nuclear power, allowing the spacecraft to continue studying the interstellar medium beyond the solar system. Voyager 2’s LECP was silenced earlier in 2025, and only a handful of instruments remain active on both Voyagers. Voyager 1 is currently more than 15 billion miles (about 24 billion kilometers) from Earth, making it the farthest human-made object, and the instrument shutdown is part of a planned retirement sequence to maximize science as the power supply declines.

via Space|
#heliopause#interstellar-space#lecp
Voyager Encounters Unexpected 50,000 Kelvin Boundary at Solar System's Edge
science8 months ago

Voyager Encounters Unexpected 50,000 Kelvin Boundary at Solar System's Edge

NASA's Voyager 1 and Voyager 2 spacecraft have detected a hot, energetic boundary at the edge of our solar system called the heliopause, where temperatures spike to 30,000-50,000 Kelvin, marking the transition from solar to interstellar space. The findings challenge previous assumptions about the magnetic field and permeability of this boundary, providing new insights into how our solar system interacts with the galaxy.

via The Daily Galaxy|
#heliopause#heliosphere#interstellar-space
NASA's Voyager Encounters a Fiery Barrier at the Solar System's Edge
science9 months ago

NASA's Voyager Encounters a Fiery Barrier at the Solar System's Edge

NASA's Voyager 1 has encountered a 'wall of fire' at the edge of the Solar System, a hot zone near the heliopause, which marks the boundary between our Solar System and interstellar space. Data from Voyager 1 and Voyager 2 reveal that beyond this boundary, magnetic fields are aligned parallel to those inside the heliosphere, providing new insights into the nature of this frontier.

via Dagens.com|
#heliopause#interstellar-space#magnetic-fields
NASA's Voyager Detects Hot 'Wall' at Solar System's Edge Linked to 1977 Wow! Signal
science9 months ago

NASA's Voyager Detects Hot 'Wall' at Solar System's Edge Linked to 1977 Wow! Signal

NASA's Voyager spacecraft discovered a 'wall of fire' at the edge of the solar system, with temperatures between 30,000 and 50,000 Kelvin, as they crossed the heliopause, marking the boundary where the solar wind meets interstellar space. Despite the extreme temperatures, the probes survived due to the sparse particle environment, providing valuable data about the solar system's outer limits and magnetic field alignment beyond the heliosphere.

via IFLScience|
#heliopause#interstellar-space#science