Today, there are more than 2,600 active satellites in orbit, as well as thousands of dead satellites that circle the planet as space junk . But plummeting rocket prices and a revolution in small electronics are now fueling a commercial space rush, with companies combining to launch hundreds of additional satellites into orbit every year.
This makes Vanguard Earth’s longest-orbiting artificial satellite, as well as the oldest human-made object still in space. And that's not likely to change any time soon. Although Vanguard stopped communicating with Earth in 1964, it will remain in orbit for centuries to come.
And here's another article:
Stars locked in 'fiercely tight' orbit could reveal universe's biggest mysteries - Daily Record
A neutron star, the ultra-dense remains of a supernova, is believed to be in a doomed orbit around a pulsar before they collide in a whopping 470 million years.
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Scientists said it is unusual to see a binary system that has two neutron stars with different masses orbiting each other.
When these stars eventually merge, it is thought they will release massive amounts of energy in the form of gravitational waves and light.
Israel successfully places surveillance satellite into orbit – Spaceflight Now
For the first time in nearly four years, a rocket successfully shot into orbit from Israel on Monday with a military reconnaissance satellite to shore up the country’s space-based capability to surveil Iran and other adversaries.
A Shavit 2 launcher carried the Ofek 16 Earth-imaging satellite into orbit from the Palmachim air base in central Israel. The three-stage rocket lifted off at 0100 GMT Monday (9 p.m. EDT Sunday), or at 4 a.m. local time in Israel, according to the Israel Ministry of Defense.
A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887 | Science
Exoplanets can interact gravitationally with other objects orbiting the same star, affecting their evolution and stability. Studying these effects requires locating systems with multiple planets. Monitoring the nearby red dwarf star GJ 887, Jeffers et al. detected periodic radial velocity signals, indicating the presence of two planets on orbits with periods of about 9 and 22 days and a further candidate planet (see the Perspective by Davies).
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The closet exoplanets to the Sun provide opportunities for detailed characterization of planets outside the Solar System. We report the discovery, using radial velocity measurements, of a compact multiplanet system of super-Earth exoplanets orbiting the nearby red dwarf star GJ 887. The two planets have orbital periods of 9.3 and 21.8 days. Assuming an Earth-like albedo, the equilibrium temperature of the 21.8-day planet is ~350 kelvin.
Not to change the topic here:
High Earth Orbit Robotics uses imaging satellites to provide on-demand check-ups for other
HEO’s model employs cameras already on orbit mounted on Earth-observation satellites operated by partner companies, and tasks them with collecting images of the satellites of its customers, who are looking to ensure their spacecraft are in good working order, oriented in the correct way and with all their payloads properly deployed.
The beauty of HEO’s model is that it’s truly a win for all involved; Earth-observation satellites generally aren’t in use at all times — they have considerable down time, in particular when they’re over open water, for instance, HEO’s founder and CEO William Crowe tells me.
Inner Workings: Was Jupiter born beyond the current orbits of Neptune and Pluto? | PNAS
Israel launches Ofek 16 reconnaissance satellite into orbit | Space
Israel has successfully launched a new reconnaissance satellite into orbit, the latest in a series of spy satellites for the country that date back to 1988.
The Ofek 16 satellite lifted off at 9 p.m. EDT (0100 GMT) on Sunday, July 5. It was 4 a.m. local time in Israel, Monday, July 6, at launch time. The satellite reached orbit atop a Shavit 2 rocket that flew from the Palmachim air base in central Israel, according to a statement from Israel Aerospace Industries (IAI).
Two Interacting Gas Giants Orbit Sun-Like Star WASP-148 | Astronomy | Sci-News.com
Astronomers using the SuperWASP-North telescope on La Palma in the Canary Islands, Spain, and the SOPHIE spectrograph at the Observatoire de Haute-Provence, France, have discovered two giant exoplanets circling the G-type dwarf star WASP-148.
An artist's impression of the WASP-148 planetary system. Image credit: Mark A. Garlick / Institut d'astrophysique de Paris.
WASP-148 is a slowly rotating, inactive G-dwarf star 809 light-years away in the constellation of Hercules.
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