The Helix Nebula (NGC 7293) is one of the closest and brightest planetary nebulae, and therefore a benchmark for resolving how the late-stage ejecta of stars couple to their surroundings. Using the Gaia EDR3/DR3 astrometric solution for the central star (WD 2226-210), we adopt a distance of d = 198.6 (+1.6/−1.8) pc (ref. 10). Imaging of the Helix
Exploratory biomarker analyses were performed in 190 patients (nivolumab, 98 out of 229 (43%); placebo, 92 out of 232 (40%)) with evaluable paired tumour samples from screening and blood samples from ≥1 time point during the study for whole-exome sequencing (WES). These individuals constituted the biomarker-evaluable population. The most common reasons for exclusion were samples
Novoselov, K. S. et al. Two-dimensional gas of massless Dirac fermions in graphene. Nature 438, 197–200 (2005). Article ADS CAS PubMed Google Scholar Zhang, Y., Tan, Y., Stormer, H. L. & Kim, P. Experimental observation of the quantum Hall effect and Berry’s phase in graphene. Nature 438, 201–204 (2005). Article ADS CAS PubMed Google Scholar
Glueballs are made of gluons, which bind quarks to form protons and neutrons.Credit: Sefa kart/Getty After almost two decades of searching, a team of physicists in China says it has observed strong evidence of a mysterious particle called a glueball that is made entirely of force-carrying particles. Researchers at the Beijing Spectrometer III (BESIII) Collaboration,
Hello Nature readers, would you like to get this Briefing in your inbox free every day? Sign up here. Solar prominences protruding from the Sun’s corona during a total solar eclipse in Dallas in 2024.Credit: NASA/Keegan Barber On 12 August, researchers will get roughly two minutes to study the Sun’s outermost layer — the solar
The video opens with a man in his 80s slumped in a hospital bed, his face hollow as he scrunches his eyes. A jump cut advances the scene three days: the man is alert now, words gathering as he identifies his son. Six months later, he is pictured sitting upright, engaged in conversation. His gaze