Space News & Blog Articles

Supermassive Black Holes (SMBH), which reside at the center of many galaxies (ranging from dwarf to massive), are a true force of nature. Over time, dust and gas from their surroundings fall toward them, forming an accretion disk just outside the event horizon that is accelerated to near the speed of light (aka relativistic speed). This releases a tremendous amount of energy, temporarily making the core region outshine all the stars in the disk - what is known as an Active Galactic Nucleus (AGN). Over time, this matter slowly accretes onto the black hole's face, also resulting in radiation across the spectrum.

The exact moment when life began on Earth may be forever hidden from us. But scientific research can explore the events leading up to that moment. Researchers have mad a lot of progress in finding the building blocks of life and in understanding how they formed.

Ever since humans learned that there are countless stars in the Universe with their own planetary systems, we have wondered if intelligent life exists beyond Earth. For more than 60 years, scientists have engaged in the Search for Extraterrestrial Intelligence (SETI), but all these attempts have yielded no definitive results. This has led scientists to question their methods and the possible indications of technological activity (aka. technosignatures) they should be looking for. In addition, they have come to consider expanding the search to include different forms of communication.

There are many reasons why Earth is habitable. One of them is that it's in a delicately balanced radiation struggle with the Sun and the larger cosmos. The Sun emits a powerful solar wind that would strip away the planet's atmosphere, except it's deflected by Earth's protective shield, the magnetosphere. Cosmic rays, dangerous high-energy particles that can damage living tissue, stream in from elsewhere in the cosmos, and they're likewise deflected by the magnetosphere.

The early stage of giant telescope development involves a lot of horse-trading to try to appease all the different stakeholders that are hoping to get what they want out of the project, but also to try to appease the financial managers that want to minimize its cost. Typically this horse-trading takes the form of a series of white papers that describe what would be needed to meet the stated objectives of the mission and suggest the type of instrumentation and systems that would be needed to achieve them. One such white paper was recently released by the Living Worlds Working Group, which is tasked with speccing out the Habitable Worlds Observatory (HWO), one of the world’s premiere exoplanet hunting telescopes that is currently in the early development stage. Their argument in the paper, which is available in pre-print on arXiv, shows that, in order to meet the objectives laid out in the recent Decadal survey that called for the telescope, it must have extremely high signal-to-noise ratio, but also be able to capture a very wide spectrum of light.