The size of the known universe is vast, and estimates can vary depending on what is considered the "observable universe." Here are key details:
Space News & Blog Articles
What Will It Take To Reach Zero Space Debris?
The space debris problem won’t solve itself. We’ve been kicking the can down the road for years as we continue launching more rockets and payloads into space. In the last couple of years, organizations—especially the European Space Association—have begun to address the problem more seriously.
Supersonic Winds Blowing on an Extreme Exoplanet
The exoplanet WASP-127b is an unusual world. It is about 30% larger than Jupiter but has just a fifth of Jupiter’s mass. It is an example of a super-puff planet because of its extremely low density. These puffy worlds are so unusual that we don’t know if they would resemble the gas giants of our solar system, or something more exotic, such as a large super-Earth. But a recent study of WASP-127b shows that super-puff worlds can have tremendous winds.
Europe plans to launch advanced Mars lander in 2035
The European Space Agency (ESA) wants to develop key technologies for a Mars surface lander by the mid-2030s.
China’s Chang’e 7 Will Include a Flag That Will ‘Flap’ on the Moon
China’s Chang’e 7 lunar lander mission will feature a flag fluttering in the vacuum of space.
Coronal Loops Flicker Right Before the Sun Unleashes Big Flares
Predicting space weather is more complex than predicting traditional weather here on Earth. One of the most unpredictable kinds of space weather is solar flares, which explode out from the surface of the Sun and can potentially damage sensitive equipment like electrical grids and the ISS. The Carrington Event, one of the most violent solar storms in history, literally caused telegraph lines to catch fire when it occurred in 1859 – a similar storm would be much more devastating today. Due to their potentially destructive potential, scientists have long looked for ways to predict when a storm will happen, and now a team led by Emily Mason of Predictive Sciences, Inc. in San Diego thinks they might have found a way to do just that.
Hot Jupiters Can Co-Exist with Other Planets
Exoplanets come in a variety of forms and one particular type, the Hot Jupiters have recently captured the attention of astronomers. They are usually found orbiting extremely close to their host star, completing an orbit in a few days or even hours. It has been thought that they migrated further out from the star, bullying other planets out of their way. Sometimes hurling them into the star or throwing them out of the system entirely. A new study however, suggests their evolution is not quite so violent since a Hot Jupiter has been found in a system with a Super-Earth and an icy giant.
Two Lunar Landers are Off to the Moon
Back in the 60’s and 70’s it was all about the Moon. The Apollo program took human beings to the Moon for the first time and now over 50 years later things are really hotting up again. The latest mission to head toward our celestial neighbour is a SpaceX Falcon 9 rocket launching Blue Ghost Mission 1 and the HAKUTO-R lander. The Blue Ghost is part of NASA’s Commercial Lunar Payload Services (CLPS) and it carries a total of 10 NASA payloads, the other is a private Japanese enterprise to explore the Moon. The launch went well and both landers will arrive shortly.
Swarm detects tidal signatures of our oceans
A study using data from ESA’s Swarm mission suggests that faint magnetic signatures created by Earth’s tides can help us determine magma distribution under the seabed and could even give us insights into long-term trends in global ocean temperatures and salinity.
Curiosity Finds Ancient Wave Ripples on Mars
NASA’s Curiosity Rover has been exploring Mars since 2012 and, more recently has found evidence of ice-free ancient ponds and lakes on the surface. The rover found small undulations like those seen in sandy lake-beds on Earth. They would have been created by wind-driven water moving back and forth across the surface. The inescapable conclusion is that the water would have been open to the elements instead of being covered by ice. The discovery suggests the ripples formed 3.7 billion years ago.
The Star-Forming Party Ended Early in Isolated Dwarf Galaxies
Gas is the stuff of star formation, and most galaxies have enough gas in their budget to form some stars. However, the picture is a little different for dwarf galaxies. They lack the mass required to hold onto their gas when more massive neighbouring galaxies are siphoning it off.
A Tether Covered in Solar Panels Could Boost the ISS’s Orbit
The ISS’s orbit is slowly decaying. While it might seem a permanent fixture in the sky, the orbiting space laboratory is only about 400 km above the planet. There might not be a lot of atmosphere at that altitude. However, there is still some, and interacting with that is gradually slowing the orbital speed of the station, decreasing its orbit, and, eventually, pulling it back to Earth. That is, if we didn’t do anything to stop it. Over the 25-year lifespan of the station, hundreds of tons of hydrazine rocket fuel have been carried to it to enable rocket-propelled orbital maneuvers to keep its orbit from decaying. But what if there was a better way – one that was self-powered, inexpensive, and didn’t require constant refueling?
SpaceX launches 21 Starlink satellites on Falcon 9 rocket from the Kennedy Space Center
A SpaceX Falcon 9 rocket lifted off from the pad at Launch Complex 39A at NASA’s Kennedy Space Center to begin the Starlink 13-1 mission on Tuesday, Jan. 21, 2025. Image: Adam Bernstein/Spaceflight Now
SpaceX launched its latest batch of Starlink satellites for its internet megaconstellation shortly after midnight on Tuesday. However, there may have been additional satellites onboard as well.
Habitable Worlds Could Have Formed Before the First Galaxies
What came first, galaxies or planets? The answer has always been galaxies, but new research is changing that idea.
Planet Profile - Jupiter
Planet Profile: Jupiter
Basic Facts:
- Type: Gas Giant
- Diameter: 86,881 miles (139,822 km)
- Mass: 318 times Earth's mass
- Orbit Period: 11.86 Earth years
- Day Length: 9 hours 56 minutes (the shortest day of any planet in the Solar System)
- Distance from the Sun: Approximately 484 million miles (778 million km)
Composition:
- Atmosphere: Primarily composed of hydrogen (about 90%) and helium (about 10%), with traces of methane, ammonia, and other gases. Jupiter has a thick atmosphere and a very strong magnetic field.
- Core: Jupiter's core is thought to be rocky and made up of metals and silicates, surrounded by a deep layer of liquid hydrogen and helium.
Key Features:
Great Red Spot:
Major telescope makers hit by class action lawsuit over alleged price fixing
Amateur astronomers who have purchased telescopes from leading suppliers in the U.S. may be entitled to a payment from a class action settlement.
Review: Dwarf Lab’s New Dwarf 3 Smartscope
DwarfLab’s new Dwarf 3 smartscope packs a powerful punch in a small unit.
Malargüe: A satellite dish best served cold
A capacity increase by almost 80%! In late July 2024, the Malargüe deep-space communication station completed an important upgrade of its antenna feed that will allow missions to send much more data back to Earth.
Seed-sized space chip
Image: Seed-sized space chip
Earth from Space: Frozen borders
Image: This Copernicus Sentinel-2 image captures the borders between North and South Dakota and Minnesota blanketed with snow and ice.